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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkcanvtext.c,v 1.1.1.1 2001/06/13 04:57:44 dtashley Exp $ */ |
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/* |
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* tkCanvText.c -- |
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* |
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* This file implements text items for canvas widgets. |
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* |
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* Copyright (c) 1991-1994 The Regents of the University of California. |
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* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
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* |
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* See the file "license.terms" for information on usage and redistribution |
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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* |
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* RCS: @(#) $Id: tkcanvtext.c,v 1.1.1.1 2001/06/13 04:57:44 dtashley Exp $ |
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*/ |
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#include <stdio.h> |
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#include "tkInt.h" |
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#include "tkCanvas.h" |
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#include "tkPort.h" |
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#include "default.h" |
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/* |
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* The structure below defines the record for each text item. |
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*/ |
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typedef struct TextItem { |
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Tk_Item header; /* Generic stuff that's the same for all |
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* types. MUST BE FIRST IN STRUCTURE. */ |
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Tk_CanvasTextInfo *textInfoPtr; |
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/* Pointer to a structure containing |
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* information about the selection and |
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* insertion cursor. The structure is owned |
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* by (and shared with) the generic canvas |
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* code. */ |
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/* |
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* Fields that are set by widget commands other than "configure". |
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*/ |
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double x, y; /* Positioning point for text. */ |
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int insertPos; /* Character index of character just before |
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* which the insertion cursor is displayed. */ |
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/* |
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* Configuration settings that are updated by Tk_ConfigureWidget. |
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*/ |
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Tk_Anchor anchor; /* Where to anchor text relative to (x,y). */ |
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Tk_TSOffset tsoffset; |
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XColor *color; /* Color for text. */ |
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XColor *activeColor; /* Color for text. */ |
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XColor *disabledColor; /* Color for text. */ |
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Tk_Font tkfont; /* Font for drawing text. */ |
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Tk_Justify justify; /* Justification mode for text. */ |
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Pixmap stipple; /* Stipple bitmap for text, or None. */ |
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Pixmap activeStipple; /* Stipple bitmap for text, or None. */ |
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Pixmap disabledStipple; /* Stipple bitmap for text, or None. */ |
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char *text; /* Text for item (malloc-ed). */ |
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int width; /* Width of lines for word-wrap, pixels. |
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* Zero means no word-wrap. */ |
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/* |
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* Fields whose values are derived from the current values of the |
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* configuration settings above. |
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*/ |
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int numChars; /* Length of text in characters. */ |
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int numBytes; /* Length of text in bytes. */ |
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Tk_TextLayout textLayout; /* Cached text layout information. */ |
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int leftEdge; /* Pixel location of the left edge of the |
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* text item; where the left border of the |
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* text layout is drawn. */ |
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int rightEdge; /* Pixel just to right of right edge of |
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* area of text item. Used for selecting up |
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* to end of line. */ |
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GC gc; /* Graphics context for drawing text. */ |
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GC selTextGC; /* Graphics context for selected text. */ |
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GC cursorOffGC; /* If not None, this gives a graphics context |
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* to use to draw the insertion cursor when |
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* it's off. Used if the selection and |
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* insertion cursor colors are the same. */ |
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} TextItem; |
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/* |
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* Information used for parsing configuration specs: |
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*/ |
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static Tk_CustomOption stateOption = { |
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(Tk_OptionParseProc *) TkStateParseProc, |
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TkStatePrintProc, (ClientData) 2 |
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}; |
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static Tk_CustomOption tagsOption = { |
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(Tk_OptionParseProc *) Tk_CanvasTagsParseProc, |
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Tk_CanvasTagsPrintProc, (ClientData) NULL |
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}; |
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static Tk_CustomOption offsetOption = { |
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(Tk_OptionParseProc *) TkOffsetParseProc, |
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TkOffsetPrintProc, (ClientData) (TK_OFFSET_RELATIVE) |
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}; |
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static Tk_ConfigSpec configSpecs[] = { |
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{TK_CONFIG_COLOR, "-activefill", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(TextItem, activeColor), TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_BITMAP, "-activestipple", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(TextItem, activeStipple), TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL, |
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"center", Tk_Offset(TextItem, anchor), |
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TK_CONFIG_DONT_SET_DEFAULT}, |
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{TK_CONFIG_COLOR, "-disabledfill", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(TextItem, disabledColor), TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_BITMAP, "-disabledstipple", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(TextItem, disabledStipple), TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_COLOR, "-fill", (char *) NULL, (char *) NULL, |
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"black", Tk_Offset(TextItem, color), TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_FONT, "-font", (char *) NULL, (char *) NULL, |
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DEF_CANVTEXT_FONT, Tk_Offset(TextItem, tkfont), 0}, |
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{TK_CONFIG_JUSTIFY, "-justify", (char *) NULL, (char *) NULL, |
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"left", Tk_Offset(TextItem, justify), |
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TK_CONFIG_DONT_SET_DEFAULT}, |
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{TK_CONFIG_CUSTOM, "-offset", (char *) NULL, (char *) NULL, |
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"0,0", Tk_Offset(TextItem, tsoffset), |
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TK_CONFIG_DONT_SET_DEFAULT, &offsetOption}, |
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{TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, |
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&stateOption}, |
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{TK_CONFIG_BITMAP, "-stipple", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(TextItem, stipple), TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL, |
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(char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, |
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{TK_CONFIG_STRING, "-text", (char *) NULL, (char *) NULL, |
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"", Tk_Offset(TextItem, text), 0}, |
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{TK_CONFIG_PIXELS, "-width", (char *) NULL, (char *) NULL, |
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"0", Tk_Offset(TextItem, width), TK_CONFIG_DONT_SET_DEFAULT}, |
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{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, |
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(char *) NULL, 0, 0} |
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}; |
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/* |
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* Prototypes for procedures defined in this file: |
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*/ |
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static void ComputeTextBbox _ANSI_ARGS_((Tk_Canvas canvas, |
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TextItem *textPtr)); |
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static int ConfigureText _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, Tk_Item *itemPtr, int argc, |
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Tcl_Obj *CONST argv[], int flags)); |
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static int CreateText _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, struct Tk_Item *itemPtr, |
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int argc, Tcl_Obj *CONST argv[])); |
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static void DeleteText _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, Display *display)); |
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static void DisplayCanvText _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, Display *display, Drawable dst, |
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int x, int y, int width, int height)); |
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static int GetSelText _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, int offset, char *buffer, |
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int maxBytes)); |
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static int GetTextIndex _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, Tk_Item *itemPtr, |
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Tcl_Obj *obj, int *indexPtr)); |
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static void ScaleText _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, double originX, double originY, |
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double scaleX, double scaleY)); |
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static void SetTextCursor _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, int index)); |
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static int TextCoords _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, Tk_Item *itemPtr, |
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int argc, Tcl_Obj *CONST argv[])); |
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static void TextDeleteChars _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, int first, int last)); |
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static void TextInsert _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, int beforeThis, char *string)); |
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static int TextToArea _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, double *rectPtr)); |
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static double TextToPoint _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, double *pointPtr)); |
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static int TextToPostscript _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, Tk_Item *itemPtr, int prepass)); |
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static void TranslateText _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, double deltaX, double deltaY)); |
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/* |
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* The structures below defines the rectangle and oval item types |
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* by means of procedures that can be invoked by generic item code. |
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*/ |
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Tk_ItemType tkTextType = { |
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"text", /* name */ |
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sizeof(TextItem), /* itemSize */ |
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CreateText, /* createProc */ |
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configSpecs, /* configSpecs */ |
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ConfigureText, /* configureProc */ |
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TextCoords, /* coordProc */ |
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DeleteText, /* deleteProc */ |
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DisplayCanvText, /* displayProc */ |
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TK_CONFIG_OBJS, /* flags */ |
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TextToPoint, /* pointProc */ |
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TextToArea, /* areaProc */ |
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TextToPostscript, /* postscriptProc */ |
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ScaleText, /* scaleProc */ |
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TranslateText, /* translateProc */ |
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(Tk_ItemIndexProc *) GetTextIndex,/* indexProc */ |
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SetTextCursor, /* icursorProc */ |
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GetSelText, /* selectionProc */ |
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TextInsert, /* insertProc */ |
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TextDeleteChars, /* dTextProc */ |
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(Tk_ItemType *) NULL, /* nextPtr */ |
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}; |
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/* |
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*-------------------------------------------------------------- |
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* |
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* CreateText -- |
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* |
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* This procedure is invoked to create a new text item |
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* in a canvas. |
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* |
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* Results: |
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* A standard Tcl return value. If an error occurred in |
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* creating the item then an error message is left in |
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* the interp's result; in this case itemPtr is left uninitialized |
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* so it can be safely freed by the caller. |
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* |
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* Side effects: |
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* A new text item is created. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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static int |
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CreateText(interp, canvas, itemPtr, argc, argv) |
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Tcl_Interp *interp; /* Interpreter for error reporting. */ |
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Tk_Canvas canvas; /* Canvas to hold new item. */ |
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Tk_Item *itemPtr; /* Record to hold new item; header has been |
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* initialized by caller. */ |
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int argc; /* Number of arguments in argv. */ |
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Tcl_Obj *CONST argv[]; /* Arguments describing rectangle. */ |
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{ |
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TextItem *textPtr = (TextItem *) itemPtr; |
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int i; |
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if (argc==1) { |
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i = 1; |
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} else { |
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char *arg = Tcl_GetStringFromObj(argv[1], NULL); |
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if ((argc>1) && (arg[0] == '-') |
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&& (arg[1] >= 'a') && (arg[1] <= 'z')) { |
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i = 1; |
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} else { |
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i = 2; |
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} |
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} |
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if (argc < i) { |
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Tcl_AppendResult(interp, "wrong # args: should be \"", |
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Tk_PathName(Tk_CanvasTkwin(canvas)), " create ", |
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itemPtr->typePtr->name, " x y ?options?\"", (char *) NULL); |
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return TCL_ERROR; |
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} |
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/* |
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* Carry out initialization that is needed in order to clean up after |
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* errors during the the remainder of this procedure. |
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*/ |
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textPtr->textInfoPtr = Tk_CanvasGetTextInfo(canvas); |
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textPtr->insertPos = 0; |
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textPtr->anchor = TK_ANCHOR_CENTER; |
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textPtr->tsoffset.flags = 0; |
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textPtr->tsoffset.xoffset = 0; |
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textPtr->tsoffset.yoffset = 0; |
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textPtr->color = NULL; |
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textPtr->activeColor = NULL; |
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textPtr->disabledColor = NULL; |
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textPtr->tkfont = NULL; |
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textPtr->justify = TK_JUSTIFY_LEFT; |
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textPtr->stipple = None; |
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textPtr->activeStipple = None; |
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textPtr->disabledStipple = None; |
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textPtr->text = NULL; |
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textPtr->width = 0; |
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textPtr->numChars = 0; |
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textPtr->numBytes = 0; |
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textPtr->textLayout = NULL; |
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textPtr->leftEdge = 0; |
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textPtr->rightEdge = 0; |
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textPtr->gc = None; |
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textPtr->selTextGC = None; |
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textPtr->cursorOffGC = None; |
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/* |
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* Process the arguments to fill in the item record. |
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*/ |
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if ((TextCoords(interp, canvas, itemPtr, i, argv) != TCL_OK)) { |
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goto error; |
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} |
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if (ConfigureText(interp, canvas, itemPtr, argc-i, argv+i, 0) == TCL_OK) { |
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return TCL_OK; |
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} |
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error: |
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DeleteText(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas))); |
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return TCL_ERROR; |
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} |
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/* |
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*-------------------------------------------------------------- |
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* |
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* TextCoords -- |
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* |
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* This procedure is invoked to process the "coords" widget |
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* command on text items. See the user documentation for |
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* details on what it does. |
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* |
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* Results: |
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* Returns TCL_OK or TCL_ERROR, and sets the interp's result. |
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* |
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* Side effects: |
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* The coordinates for the given item may be changed. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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static int |
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TextCoords(interp, canvas, itemPtr, argc, argv) |
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Tcl_Interp *interp; /* Used for error reporting. */ |
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Tk_Canvas canvas; /* Canvas containing item. */ |
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Tk_Item *itemPtr; /* Item whose coordinates are to be read or |
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* modified. */ |
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int argc; /* Number of coordinates supplied in argv. */ |
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Tcl_Obj *CONST argv[]; /* Array of coordinates: x1, y1, x2, y2, ... */ |
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{ |
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TextItem *textPtr = (TextItem *) itemPtr; |
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if (argc == 0) { |
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Tcl_Obj *obj = Tcl_NewObj(); |
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Tcl_Obj *subobj = Tcl_NewDoubleObj(textPtr->x); |
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Tcl_ListObjAppendElement(interp, obj, subobj); |
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subobj = Tcl_NewDoubleObj(textPtr->y); |
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Tcl_ListObjAppendElement(interp, obj, subobj); |
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Tcl_SetObjResult(interp, obj); |
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} else if (argc < 3) { |
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if (argc==1) { |
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if (Tcl_ListObjGetElements(interp, argv[0], &argc, |
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(Tcl_Obj ***) &argv) != TCL_OK) { |
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return TCL_ERROR; |
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} else if (argc != 2) { |
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char buf[64 + TCL_INTEGER_SPACE]; |
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sprintf(buf, "wrong # coordinates: expected 2, got %d", argc); |
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Tcl_SetResult(interp, buf, TCL_VOLATILE); |
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return TCL_ERROR; |
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} |
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} |
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if ((Tk_CanvasGetCoordFromObj(interp, canvas, argv[0], &textPtr->x) != TCL_OK) |
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|| (Tk_CanvasGetCoordFromObj(interp, canvas, argv[1], |
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&textPtr->y) != TCL_OK)) { |
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return TCL_ERROR; |
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} |
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ComputeTextBbox(canvas, textPtr); |
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} else { |
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char buf[64 + TCL_INTEGER_SPACE]; |
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sprintf(buf, "wrong # coordinates: expected 0 or 2, got %d", argc); |
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Tcl_SetResult(interp, buf, TCL_VOLATILE); |
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return TCL_ERROR; |
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} |
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return TCL_OK; |
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} |
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/* |
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*-------------------------------------------------------------- |
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* |
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* ConfigureText -- |
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* |
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* This procedure is invoked to configure various aspects |
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* of a text item, such as its border and background colors. |
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* |
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* Results: |
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* A standard Tcl result code. If an error occurs, then |
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* an error message is left in the interp's result. |
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* |
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* Side effects: |
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* Configuration information, such as colors and stipple |
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* patterns, may be set for itemPtr. |
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* |
|
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*-------------------------------------------------------------- |
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*/ |
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static int |
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ConfigureText(interp, canvas, itemPtr, argc, argv, flags) |
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Tcl_Interp *interp; /* Interpreter for error reporting. */ |
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Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
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Tk_Item *itemPtr; /* Rectangle item to reconfigure. */ |
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int argc; /* Number of elements in argv. */ |
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Tcl_Obj *CONST argv[]; /* Arguments describing things to configure. */ |
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int flags; /* Flags to pass to Tk_ConfigureWidget. */ |
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{ |
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TextItem *textPtr = (TextItem *) itemPtr; |
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XGCValues gcValues; |
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GC newGC, newSelGC; |
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unsigned long mask; |
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Tk_Window tkwin; |
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Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; |
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XColor *selBgColorPtr; |
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XColor *color; |
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Pixmap stipple; |
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Tk_State state; |
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tkwin = Tk_CanvasTkwin(canvas); |
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if (Tk_ConfigureWidget(interp, tkwin, configSpecs, argc, (char **) argv, |
|
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(char *) textPtr, flags|TK_CONFIG_OBJS) != TCL_OK) { |
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return TCL_ERROR; |
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} |
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|
|
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/* |
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|
* A few of the options require additional processing, such as |
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* graphics contexts. |
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|
*/ |
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state = itemPtr->state; |
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if (textPtr->activeColor != NULL || |
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textPtr->activeStipple != None) { |
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itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT; |
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} else { |
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itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT; |
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} |
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|
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if(state == TK_STATE_NULL) { |
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state = ((TkCanvas *)canvas)->canvas_state; |
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} |
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color = textPtr->color; |
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stipple = textPtr->stipple; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (textPtr->activeColor!=NULL) { |
|
|
color = textPtr->activeColor; |
|
|
} |
|
|
if (textPtr->activeStipple!=None) { |
|
|
stipple = textPtr->activeStipple; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (textPtr->disabledColor!=NULL) { |
|
|
color = textPtr->disabledColor; |
|
|
} |
|
|
if (textPtr->disabledStipple!=None) { |
|
|
stipple = textPtr->disabledStipple; |
|
|
} |
|
|
} |
|
|
|
|
|
newGC = newSelGC = None; |
|
|
if (textPtr->tkfont != NULL) { |
|
|
gcValues.font = Tk_FontId(textPtr->tkfont); |
|
|
mask = GCFont; |
|
|
if (color != NULL) { |
|
|
gcValues.foreground = color->pixel; |
|
|
mask |= GCForeground; |
|
|
if (stipple != None) { |
|
|
gcValues.stipple = stipple; |
|
|
gcValues.fill_style = FillStippled; |
|
|
mask |= GCStipple|GCFillStyle; |
|
|
} |
|
|
newGC = Tk_GetGC(tkwin, mask, &gcValues); |
|
|
} |
|
|
mask &= ~(GCTile|GCFillStyle|GCStipple); |
|
|
if (stipple != None) { |
|
|
gcValues.stipple = stipple; |
|
|
gcValues.fill_style = FillStippled; |
|
|
mask |= GCStipple|GCFillStyle; |
|
|
} |
|
|
gcValues.foreground = textInfoPtr->selFgColorPtr->pixel; |
|
|
newSelGC = Tk_GetGC(tkwin, mask|GCForeground, &gcValues); |
|
|
} |
|
|
if (textPtr->gc != None) { |
|
|
Tk_FreeGC(Tk_Display(tkwin), textPtr->gc); |
|
|
} |
|
|
textPtr->gc = newGC; |
|
|
if (textPtr->selTextGC != None) { |
|
|
Tk_FreeGC(Tk_Display(tkwin), textPtr->selTextGC); |
|
|
} |
|
|
textPtr->selTextGC = newSelGC; |
|
|
|
|
|
selBgColorPtr = Tk_3DBorderColor(textInfoPtr->selBorder); |
|
|
if (Tk_3DBorderColor(textInfoPtr->insertBorder)->pixel |
|
|
== selBgColorPtr->pixel) { |
|
|
if (selBgColorPtr->pixel == BlackPixelOfScreen(Tk_Screen(tkwin))) { |
|
|
gcValues.foreground = WhitePixelOfScreen(Tk_Screen(tkwin)); |
|
|
} else { |
|
|
gcValues.foreground = BlackPixelOfScreen(Tk_Screen(tkwin)); |
|
|
} |
|
|
newGC = Tk_GetGC(tkwin, GCForeground, &gcValues); |
|
|
} else { |
|
|
newGC = None; |
|
|
} |
|
|
if (textPtr->cursorOffGC != None) { |
|
|
Tk_FreeGC(Tk_Display(tkwin), textPtr->cursorOffGC); |
|
|
} |
|
|
textPtr->cursorOffGC = newGC; |
|
|
|
|
|
|
|
|
/* |
|
|
* If the text was changed, move the selection and insertion indices |
|
|
* to keep them inside the item. |
|
|
*/ |
|
|
|
|
|
textPtr->numBytes = strlen(textPtr->text); |
|
|
textPtr->numChars = Tcl_NumUtfChars(textPtr->text, textPtr->numBytes); |
|
|
if (textInfoPtr->selItemPtr == itemPtr) { |
|
|
|
|
|
if (textInfoPtr->selectFirst >= textPtr->numChars) { |
|
|
textInfoPtr->selItemPtr = NULL; |
|
|
} else { |
|
|
if (textInfoPtr->selectLast >= textPtr->numChars) { |
|
|
textInfoPtr->selectLast = textPtr->numChars - 1; |
|
|
} |
|
|
if ((textInfoPtr->anchorItemPtr == itemPtr) |
|
|
&& (textInfoPtr->selectAnchor >= textPtr->numChars)) { |
|
|
textInfoPtr->selectAnchor = textPtr->numChars - 1; |
|
|
} |
|
|
} |
|
|
} |
|
|
if (textPtr->insertPos >= textPtr->numChars) { |
|
|
textPtr->insertPos = textPtr->numChars; |
|
|
} |
|
|
|
|
|
ComputeTextBbox(canvas, textPtr); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* DeleteText -- |
|
|
* |
|
|
* This procedure is called to clean up the data structure |
|
|
* associated with a text item. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Resources associated with itemPtr are released. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DeleteText(canvas, itemPtr, display) |
|
|
Tk_Canvas canvas; /* Info about overall canvas widget. */ |
|
|
Tk_Item *itemPtr; /* Item that is being deleted. */ |
|
|
Display *display; /* Display containing window for canvas. */ |
|
|
{ |
|
|
TextItem *textPtr = (TextItem *) itemPtr; |
|
|
|
|
|
if (textPtr->color != NULL) { |
|
|
Tk_FreeColor(textPtr->color); |
|
|
} |
|
|
if (textPtr->activeColor != NULL) { |
|
|
Tk_FreeColor(textPtr->activeColor); |
|
|
} |
|
|
if (textPtr->disabledColor != NULL) { |
|
|
Tk_FreeColor(textPtr->disabledColor); |
|
|
} |
|
|
Tk_FreeFont(textPtr->tkfont); |
|
|
if (textPtr->stipple != None) { |
|
|
Tk_FreeBitmap(display, textPtr->stipple); |
|
|
} |
|
|
if (textPtr->activeStipple != None) { |
|
|
Tk_FreeBitmap(display, textPtr->activeStipple); |
|
|
} |
|
|
if (textPtr->disabledStipple != None) { |
|
|
Tk_FreeBitmap(display, textPtr->disabledStipple); |
|
|
} |
|
|
if (textPtr->text != NULL) { |
|
|
ckfree(textPtr->text); |
|
|
} |
|
|
|
|
|
Tk_FreeTextLayout(textPtr->textLayout); |
|
|
if (textPtr->gc != None) { |
|
|
Tk_FreeGC(display, textPtr->gc); |
|
|
} |
|
|
if (textPtr->selTextGC != None) { |
|
|
Tk_FreeGC(display, textPtr->selTextGC); |
|
|
} |
|
|
if (textPtr->cursorOffGC != None) { |
|
|
Tk_FreeGC(display, textPtr->cursorOffGC); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ComputeTextBbox -- |
|
|
* |
|
|
* This procedure is invoked to compute the bounding box of |
|
|
* all the pixels that may be drawn as part of a text item. |
|
|
* In addition, it recomputes all of the geometry information |
|
|
* used to display a text item or check for mouse hits. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The fields x1, y1, x2, and y2 are updated in the header |
|
|
* for itemPtr, and the linePtr structure is regenerated |
|
|
* for itemPtr. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ComputeTextBbox(canvas, textPtr) |
|
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
|
|
TextItem *textPtr; /* Item whose bbox is to be recomputed. */ |
|
|
{ |
|
|
Tk_CanvasTextInfo *textInfoPtr; |
|
|
int leftX, topY, width, height, fudge; |
|
|
Tk_State state = textPtr->header.state; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
Tk_FreeTextLayout(textPtr->textLayout); |
|
|
textPtr->textLayout = Tk_ComputeTextLayout(textPtr->tkfont, |
|
|
textPtr->text, textPtr->numChars, textPtr->width, |
|
|
textPtr->justify, 0, &width, &height); |
|
|
|
|
|
if (state == TK_STATE_HIDDEN || textPtr->color == NULL) { |
|
|
width = height = 0; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Use overall geometry information to compute the top-left corner |
|
|
* of the bounding box for the text item. |
|
|
*/ |
|
|
|
|
|
leftX = (int) (textPtr->x + 0.5); |
|
|
topY = (int) (textPtr->y + 0.5); |
|
|
switch (textPtr->anchor) { |
|
|
case TK_ANCHOR_NW: |
|
|
case TK_ANCHOR_N: |
|
|
case TK_ANCHOR_NE: |
|
|
break; |
|
|
|
|
|
case TK_ANCHOR_W: |
|
|
case TK_ANCHOR_CENTER: |
|
|
case TK_ANCHOR_E: |
|
|
topY -= height / 2; |
|
|
break; |
|
|
|
|
|
case TK_ANCHOR_SW: |
|
|
case TK_ANCHOR_S: |
|
|
case TK_ANCHOR_SE: |
|
|
topY -= height; |
|
|
break; |
|
|
} |
|
|
switch (textPtr->anchor) { |
|
|
case TK_ANCHOR_NW: |
|
|
case TK_ANCHOR_W: |
|
|
case TK_ANCHOR_SW: |
|
|
break; |
|
|
|
|
|
case TK_ANCHOR_N: |
|
|
case TK_ANCHOR_CENTER: |
|
|
case TK_ANCHOR_S: |
|
|
leftX -= width / 2; |
|
|
break; |
|
|
|
|
|
case TK_ANCHOR_NE: |
|
|
case TK_ANCHOR_E: |
|
|
case TK_ANCHOR_SE: |
|
|
leftX -= width; |
|
|
break; |
|
|
} |
|
|
|
|
|
textPtr->leftEdge = leftX; |
|
|
textPtr->rightEdge = leftX + width; |
|
|
|
|
|
/* |
|
|
* Last of all, update the bounding box for the item. The item's |
|
|
* bounding box includes the bounding box of all its lines, plus |
|
|
* an extra fudge factor for the cursor border (which could |
|
|
* potentially be quite large). |
|
|
*/ |
|
|
|
|
|
textInfoPtr = textPtr->textInfoPtr; |
|
|
fudge = (textInfoPtr->insertWidth + 1) / 2; |
|
|
if (textInfoPtr->selBorderWidth > fudge) { |
|
|
fudge = textInfoPtr->selBorderWidth; |
|
|
} |
|
|
textPtr->header.x1 = leftX - fudge; |
|
|
textPtr->header.y1 = topY; |
|
|
textPtr->header.x2 = leftX + width + fudge; |
|
|
textPtr->header.y2 = topY + height; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* DisplayCanvText -- |
|
|
* |
|
|
* This procedure is invoked to draw a text item in a given |
|
|
* drawable. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* ItemPtr is drawn in drawable using the transformation |
|
|
* information in canvas. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DisplayCanvText(canvas, itemPtr, display, drawable, x, y, width, height) |
|
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
|
|
Tk_Item *itemPtr; /* Item to be displayed. */ |
|
|
Display *display; /* Display on which to draw item. */ |
|
|
Drawable drawable; /* Pixmap or window in which to draw item. */ |
|
|
int x, y, width, height; /* Describes region of canvas that must be |
|
|
* redisplayed (not used). */ |
|
|
{ |
|
|
TextItem *textPtr; |
|
|
Tk_CanvasTextInfo *textInfoPtr; |
|
|
int selFirstChar, selLastChar; |
|
|
short drawableX, drawableY; |
|
|
Pixmap stipple; |
|
|
Tk_State state = itemPtr->state; |
|
|
|
|
|
textPtr = (TextItem *) itemPtr; |
|
|
textInfoPtr = textPtr->textInfoPtr; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
stipple = textPtr->stipple; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (textPtr->activeStipple!=None) { |
|
|
stipple = textPtr->activeStipple; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (textPtr->disabledStipple!=None) { |
|
|
stipple = textPtr->disabledStipple; |
|
|
} |
|
|
} |
|
|
|
|
|
if (textPtr->gc == None) { |
|
|
return; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If we're stippling, then modify the stipple offset in the GC. Be |
|
|
* sure to reset the offset when done, since the GC is supposed to be |
|
|
* read-only. |
|
|
*/ |
|
|
|
|
|
if (stipple != None) { |
|
|
Tk_CanvasSetOffset(canvas, textPtr->gc, &textPtr->tsoffset); |
|
|
} |
|
|
|
|
|
selFirstChar = -1; |
|
|
selLastChar = 0; /* lint. */ |
|
|
|
|
|
if (textInfoPtr->selItemPtr == itemPtr) { |
|
|
selFirstChar = textInfoPtr->selectFirst; |
|
|
selLastChar = textInfoPtr->selectLast; |
|
|
if (selLastChar > textPtr->numChars) { |
|
|
selLastChar = textPtr->numChars - 1; |
|
|
} |
|
|
if ((selFirstChar >= 0) && (selFirstChar <= selLastChar)) { |
|
|
int xFirst, yFirst, hFirst; |
|
|
int xLast, yLast; |
|
|
|
|
|
/* |
|
|
* Draw a special background under the selection. |
|
|
*/ |
|
|
|
|
|
Tk_CharBbox(textPtr->textLayout, selFirstChar, &xFirst, &yFirst, |
|
|
NULL, &hFirst); |
|
|
Tk_CharBbox(textPtr->textLayout, selLastChar, &xLast, &yLast, |
|
|
NULL, NULL); |
|
|
|
|
|
/* |
|
|
* If the selection spans the end of this line, then display |
|
|
* selection background all the way to the end of the line. |
|
|
* However, for the last line we only want to display up to the |
|
|
* last character, not the end of the line. |
|
|
*/ |
|
|
|
|
|
x = xFirst; |
|
|
height = hFirst; |
|
|
for (y = yFirst ; y <= yLast; y += height) { |
|
|
if (y == yLast) { |
|
|
width = xLast - x; |
|
|
} else { |
|
|
width = textPtr->rightEdge - textPtr->leftEdge - x; |
|
|
} |
|
|
Tk_CanvasDrawableCoords(canvas, |
|
|
(double) (textPtr->leftEdge + x |
|
|
- textInfoPtr->selBorderWidth), |
|
|
(double) (textPtr->header.y1 + y), |
|
|
&drawableX, &drawableY); |
|
|
Tk_Fill3DRectangle(Tk_CanvasTkwin(canvas), drawable, |
|
|
textInfoPtr->selBorder, drawableX, drawableY, |
|
|
width + 2 * textInfoPtr->selBorderWidth, |
|
|
height, textInfoPtr->selBorderWidth, TK_RELIEF_RAISED); |
|
|
x = 0; |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* If the insertion point should be displayed, then draw a special |
|
|
* background for the cursor before drawing the text. Note: if |
|
|
* we're the cursor item but the cursor is turned off, then redraw |
|
|
* background over the area of the cursor. This guarantees that |
|
|
* the selection won't make the cursor invisible on mono displays, |
|
|
* where both are drawn in the same color. |
|
|
*/ |
|
|
|
|
|
if ((textInfoPtr->focusItemPtr == itemPtr) && (textInfoPtr->gotFocus)) { |
|
|
if (Tk_CharBbox(textPtr->textLayout, textPtr->insertPos, |
|
|
&x, &y, NULL, &height)) { |
|
|
Tk_CanvasDrawableCoords(canvas, |
|
|
(double) (textPtr->leftEdge + x |
|
|
- (textInfoPtr->insertWidth / 2)), |
|
|
(double) (textPtr->header.y1 + y), |
|
|
&drawableX, &drawableY); |
|
|
if (textInfoPtr->cursorOn) { |
|
|
Tk_Fill3DRectangle(Tk_CanvasTkwin(canvas), drawable, |
|
|
textInfoPtr->insertBorder, |
|
|
drawableX, drawableY, |
|
|
textInfoPtr->insertWidth, height, |
|
|
textInfoPtr->insertBorderWidth, TK_RELIEF_RAISED); |
|
|
} else if (textPtr->cursorOffGC != None) { |
|
|
/* |
|
|
* Redraw the background over the area of the cursor, |
|
|
* even though the cursor is turned off. This |
|
|
* guarantees that the selection won't make the cursor |
|
|
* invisible on mono displays, where both may be drawn |
|
|
* in the same color. |
|
|
*/ |
|
|
|
|
|
XFillRectangle(display, drawable, textPtr->cursorOffGC, |
|
|
drawableX, drawableY, |
|
|
(unsigned) textInfoPtr->insertWidth, |
|
|
(unsigned) height); |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
|
|
|
/* |
|
|
* Display the text in two pieces: draw the entire text item, then |
|
|
* draw the selected text on top of it. The selected text then |
|
|
* will only need to be drawn if it has different attributes (such |
|
|
* as foreground color) than regular text. |
|
|
*/ |
|
|
|
|
|
Tk_CanvasDrawableCoords(canvas, (double) textPtr->leftEdge, |
|
|
(double) textPtr->header.y1, &drawableX, &drawableY); |
|
|
Tk_DrawTextLayout(display, drawable, textPtr->gc, textPtr->textLayout, |
|
|
drawableX, drawableY, 0, -1); |
|
|
|
|
|
if ((selFirstChar >= 0) && (textPtr->selTextGC != textPtr->gc)) { |
|
|
Tk_DrawTextLayout(display, drawable, textPtr->selTextGC, |
|
|
textPtr->textLayout, drawableX, drawableY, selFirstChar, |
|
|
selLastChar + 1); |
|
|
} |
|
|
|
|
|
if (stipple != None) { |
|
|
XSetTSOrigin(display, textPtr->gc, 0, 0); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TextInsert -- |
|
|
* |
|
|
* Insert characters into a text item at a given position. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The text in the given item is modified. The cursor and |
|
|
* selection positions are also modified to reflect the |
|
|
* insertion. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
TextInsert(canvas, itemPtr, index, string) |
|
|
Tk_Canvas canvas; /* Canvas containing text item. */ |
|
|
Tk_Item *itemPtr; /* Text item to be modified. */ |
|
|
int index; /* Character index before which string is |
|
|
* to be inserted. */ |
|
|
char *string; /* New characters to be inserted. */ |
|
|
{ |
|
|
TextItem *textPtr = (TextItem *) itemPtr; |
|
|
int byteIndex, byteCount, charsAdded; |
|
|
char *new, *text; |
|
|
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; |
|
|
|
|
|
string = Tcl_GetStringFromObj((Tcl_Obj *) string, &byteCount); |
|
|
|
|
|
text = textPtr->text; |
|
|
|
|
|
if (index < 0) { |
|
|
index = 0; |
|
|
} |
|
|
if (index > textPtr->numChars) { |
|
|
index = textPtr->numChars; |
|
|
} |
|
|
byteIndex = Tcl_UtfAtIndex(text, index) - text; |
|
|
byteCount = strlen(string); |
|
|
if (byteCount == 0) { |
|
|
return; |
|
|
} |
|
|
|
|
|
new = (char *) ckalloc((unsigned) textPtr->numBytes + byteCount + 1); |
|
|
memcpy(new, text, (size_t) byteIndex); |
|
|
strcpy(new + byteIndex, string); |
|
|
strcpy(new + byteIndex + byteCount, text + byteIndex); |
|
|
|
|
|
ckfree(text); |
|
|
textPtr->text = new; |
|
|
charsAdded = Tcl_NumUtfChars(string, byteCount); |
|
|
textPtr->numChars += charsAdded; |
|
|
textPtr->numBytes += byteCount; |
|
|
|
|
|
/* |
|
|
* Inserting characters invalidates indices such as those for the |
|
|
* selection and cursor. Update the indices appropriately. |
|
|
*/ |
|
|
|
|
|
if (textInfoPtr->selItemPtr == itemPtr) { |
|
|
if (textInfoPtr->selectFirst >= index) { |
|
|
textInfoPtr->selectFirst += charsAdded; |
|
|
} |
|
|
if (textInfoPtr->selectLast >= index) { |
|
|
textInfoPtr->selectLast += charsAdded; |
|
|
} |
|
|
if ((textInfoPtr->anchorItemPtr == itemPtr) |
|
|
&& (textInfoPtr->selectAnchor >= index)) { |
|
|
textInfoPtr->selectAnchor += charsAdded; |
|
|
} |
|
|
} |
|
|
if (textPtr->insertPos >= index) { |
|
|
textPtr->insertPos += charsAdded; |
|
|
} |
|
|
ComputeTextBbox(canvas, textPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TextDeleteChars -- |
|
|
* |
|
|
* Delete one or more characters from a text item. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Characters between "first" and "last", inclusive, get |
|
|
* deleted from itemPtr, and things like the selection |
|
|
* position get updated. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
TextDeleteChars(canvas, itemPtr, first, last) |
|
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
|
|
Tk_Item *itemPtr; /* Item in which to delete characters. */ |
|
|
int first; /* Character index of first character to |
|
|
* delete. */ |
|
|
int last; /* Character index of last character to |
|
|
* delete (inclusive). */ |
|
|
{ |
|
|
TextItem *textPtr = (TextItem *) itemPtr; |
|
|
int byteIndex, byteCount, charsRemoved; |
|
|
char *new, *text; |
|
|
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; |
|
|
|
|
|
text = textPtr->text; |
|
|
if (first < 0) { |
|
|
first = 0; |
|
|
} |
|
|
if (last >= textPtr->numChars) { |
|
|
last = textPtr->numChars - 1; |
|
|
} |
|
|
if (first > last) { |
|
|
return; |
|
|
} |
|
|
charsRemoved = last + 1 - first; |
|
|
|
|
|
byteIndex = Tcl_UtfAtIndex(text, first) - text; |
|
|
byteCount = Tcl_UtfAtIndex(text + byteIndex, charsRemoved) |
|
|
- (text + byteIndex); |
|
|
|
|
|
new = (char *) ckalloc((unsigned) (textPtr->numBytes + 1 - byteCount)); |
|
|
memcpy(new, text, (size_t) byteIndex); |
|
|
strcpy(new + byteIndex, text + byteIndex + byteCount); |
|
|
|
|
|
ckfree(text); |
|
|
textPtr->text = new; |
|
|
textPtr->numChars -= charsRemoved; |
|
|
textPtr->numBytes -= byteCount; |
|
|
|
|
|
/* |
|
|
* Update indexes for the selection and cursor to reflect the |
|
|
* renumbering of the remaining characters. |
|
|
*/ |
|
|
|
|
|
if (textInfoPtr->selItemPtr == itemPtr) { |
|
|
if (textInfoPtr->selectFirst > first) { |
|
|
textInfoPtr->selectFirst -= charsRemoved; |
|
|
if (textInfoPtr->selectFirst < first) { |
|
|
textInfoPtr->selectFirst = first; |
|
|
} |
|
|
} |
|
|
if (textInfoPtr->selectLast >= first) { |
|
|
textInfoPtr->selectLast -= charsRemoved; |
|
|
if (textInfoPtr->selectLast < first - 1) { |
|
|
textInfoPtr->selectLast = first - 1; |
|
|
} |
|
|
} |
|
|
if (textInfoPtr->selectFirst > textInfoPtr->selectLast) { |
|
|
textInfoPtr->selItemPtr = NULL; |
|
|
} |
|
|
if ((textInfoPtr->anchorItemPtr == itemPtr) |
|
|
&& (textInfoPtr->selectAnchor > first)) { |
|
|
textInfoPtr->selectAnchor -= charsRemoved; |
|
|
if (textInfoPtr->selectAnchor < first) { |
|
|
textInfoPtr->selectAnchor = first; |
|
|
} |
|
|
} |
|
|
} |
|
|
if (textPtr->insertPos > first) { |
|
|
textPtr->insertPos -= charsRemoved; |
|
|
if (textPtr->insertPos < first) { |
|
|
textPtr->insertPos = first; |
|
|
} |
|
|
} |
|
|
ComputeTextBbox(canvas, textPtr); |
|
|
return; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TextToPoint -- |
|
|
* |
|
|
* Computes the distance from a given point to a given |
|
|
* text item, in canvas units. |
|
|
* |
|
|
* Results: |
|
|
* The return value is 0 if the point whose x and y coordinates |
|
|
* are pointPtr[0] and pointPtr[1] is inside the text item. If |
|
|
* the point isn't inside the text item then the return value |
|
|
* is the distance from the point to the text item. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static double |
|
|
TextToPoint(canvas, itemPtr, pointPtr) |
|
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
|
|
Tk_Item *itemPtr; /* Item to check against point. */ |
|
|
double *pointPtr; /* Pointer to x and y coordinates. */ |
|
|
{ |
|
|
TextItem *textPtr; |
|
|
Tk_State state = itemPtr->state; |
|
|
double value; |
|
|
|
|
|
if (state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
textPtr = (TextItem *) itemPtr; |
|
|
value = (double) Tk_DistanceToTextLayout(textPtr->textLayout, |
|
|
(int) pointPtr[0] - textPtr->leftEdge, |
|
|
(int) pointPtr[1] - textPtr->header.y1); |
|
|
|
|
|
if ((state == TK_STATE_HIDDEN) || (textPtr->color == NULL) || |
|
|
(textPtr->text == NULL) || (*textPtr->text == 0)) { |
|
|
value = 1.0e36; |
|
|
} |
|
|
return value; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TextToArea -- |
|
|
* |
|
|
* This procedure is called to determine whether an item |
|
|
* lies entirely inside, entirely outside, or overlapping |
|
|
* a given rectangle. |
|
|
* |
|
|
* Results: |
|
|
* -1 is returned if the item is entirely outside the area |
|
|
* given by rectPtr, 0 if it overlaps, and 1 if it is entirely |
|
|
* inside the given area. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
TextToArea(canvas, itemPtr, rectPtr) |
|
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
|
|
Tk_Item *itemPtr; /* Item to check against rectangle. */ |
|
|
double *rectPtr; /* Pointer to array of four coordinates |
|
|
* (x1, y1, x2, y2) describing rectangular |
|
|
* area. */ |
|
|
{ |
|
|
TextItem *textPtr; |
|
|
Tk_State state = itemPtr->state; |
|
|
|
|
|
if (state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
textPtr = (TextItem *) itemPtr; |
|
|
return Tk_IntersectTextLayout(textPtr->textLayout, |
|
|
(int) (rectPtr[0] + 0.5) - textPtr->leftEdge, |
|
|
(int) (rectPtr[1] + 0.5) - textPtr->header.y1, |
|
|
(int) (rectPtr[2] - rectPtr[0] + 0.5), |
|
|
(int) (rectPtr[3] - rectPtr[1] + 0.5)); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ScaleText -- |
|
|
* |
|
|
* This procedure is invoked to rescale a text item. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Scales the position of the text, but not the size |
|
|
* of the font for the text. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
static void |
|
|
ScaleText(canvas, itemPtr, originX, originY, scaleX, scaleY) |
|
|
Tk_Canvas canvas; /* Canvas containing rectangle. */ |
|
|
Tk_Item *itemPtr; /* Rectangle to be scaled. */ |
|
|
double originX, originY; /* Origin about which to scale rect. */ |
|
|
double scaleX; /* Amount to scale in X direction. */ |
|
|
double scaleY; /* Amount to scale in Y direction. */ |
|
|
{ |
|
|
TextItem *textPtr = (TextItem *) itemPtr; |
|
|
|
|
|
textPtr->x = originX + scaleX*(textPtr->x - originX); |
|
|
textPtr->y = originY + scaleY*(textPtr->y - originY); |
|
|
ComputeTextBbox(canvas, textPtr); |
|
|
return; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TranslateText -- |
|
|
* |
|
|
* This procedure is called to move a text item by a |
|
|
* given amount. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The position of the text item is offset by (xDelta, yDelta), |
|
|
* and the bounding box is updated in the generic part of the |
|
|
* item structure. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
TranslateText(canvas, itemPtr, deltaX, deltaY) |
|
|
Tk_Canvas canvas; /* Canvas containing item. */ |
|
|
Tk_Item *itemPtr; /* Item that is being moved. */ |
|
|
double deltaX, deltaY; /* Amount by which item is to be moved. */ |
|
|
{ |
|
|
TextItem *textPtr = (TextItem *) itemPtr; |
|
|
|
|
|
textPtr->x += deltaX; |
|
|
textPtr->y += deltaY; |
|
|
ComputeTextBbox(canvas, textPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* GetTextIndex -- |
|
|
* |
|
|
* Parse an index into a text item and return either its value |
|
|
* or an error. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl result. If all went well, then *indexPtr is |
|
|
* filled in with the index (into itemPtr) corresponding to |
|
|
* string. Otherwise an error message is left in |
|
|
* the interp's result. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
GetTextIndex(interp, canvas, itemPtr, obj, indexPtr) |
|
|
Tcl_Interp *interp; /* Used for error reporting. */ |
|
|
Tk_Canvas canvas; /* Canvas containing item. */ |
|
|
Tk_Item *itemPtr; /* Item for which the index is being |
|
|
* specified. */ |
|
|
Tcl_Obj *obj; /* Specification of a particular character |
|
|
* in itemPtr's text. */ |
|
|
int *indexPtr; /* Where to store converted character |
|
|
* index. */ |
|
|
{ |
|
|
TextItem *textPtr = (TextItem *) itemPtr; |
|
|
size_t length; |
|
|
int c; |
|
|
TkCanvas *canvasPtr = (TkCanvas *) canvas; |
|
|
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; |
|
|
char *string = Tcl_GetStringFromObj(obj, (int *) &length); |
|
|
|
|
|
c = string[0]; |
|
|
length = strlen(string); |
|
|
|
|
|
if ((c == 'e') && (strncmp(string, "end", length) == 0)) { |
|
|
*indexPtr = textPtr->numChars; |
|
|
} else if ((c == 'i') && (strncmp(string, "insert", length) == 0)) { |
|
|
*indexPtr = textPtr->insertPos; |
|
|
} else if ((c == 's') && (strncmp(string, "sel.first", length) == 0) |
|
|
&& (length >= 5)) { |
|
|
if (textInfoPtr->selItemPtr != itemPtr) { |
|
|
Tcl_SetResult(interp, "selection isn't in item", TCL_STATIC); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
*indexPtr = textInfoPtr->selectFirst; |
|
|
} else if ((c == 's') && (strncmp(string, "sel.last", length) == 0) |
|
|
&& (length >= 5)) { |
|
|
if (textInfoPtr->selItemPtr != itemPtr) { |
|
|
Tcl_SetResult(interp, "selection isn't in item", TCL_STATIC); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
*indexPtr = textInfoPtr->selectLast; |
|
|
} else if (c == '@') { |
|
|
int x, y; |
|
|
double tmp; |
|
|
char *end, *p; |
|
|
|
|
|
p = string+1; |
|
|
tmp = strtod(p, &end); |
|
|
if ((end == p) || (*end != ',')) { |
|
|
goto badIndex; |
|
|
} |
|
|
x = (int) ((tmp < 0) ? tmp - 0.5 : tmp + 0.5); |
|
|
p = end+1; |
|
|
tmp = strtod(p, &end); |
|
|
if ((end == p) || (*end != 0)) { |
|
|
goto badIndex; |
|
|
} |
|
|
y = (int) ((tmp < 0) ? tmp - 0.5 : tmp + 0.5); |
|
|
*indexPtr = Tk_PointToChar(textPtr->textLayout, |
|
|
x + canvasPtr->scrollX1 - textPtr->leftEdge, |
|
|
y + canvasPtr->scrollY1 - textPtr->header.y1); |
|
|
} else if (Tcl_GetIntFromObj((Tcl_Interp *)NULL, obj, indexPtr) == TCL_OK) { |
|
|
if (*indexPtr < 0){ |
|
|
*indexPtr = 0; |
|
|
} else if (*indexPtr > textPtr->numChars) { |
|
|
*indexPtr = textPtr->numChars; |
|
|
} |
|
|
} else { |
|
|
/* |
|
|
* Some of the paths here leave messages in the interp's result, |
|
|
* so we have to clear it out before storing our own message. |
|
|
*/ |
|
|
|
|
|
badIndex: |
|
|
Tcl_SetResult(interp, (char *) NULL, TCL_STATIC); |
|
|
Tcl_AppendResult(interp, "bad index \"", string, "\"", |
|
|
(char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* SetTextCursor -- |
|
|
* |
|
|
* Set the position of the insertion cursor in this item. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The cursor position will change. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
static void |
|
|
SetTextCursor(canvas, itemPtr, index) |
|
|
Tk_Canvas canvas; /* Record describing canvas widget. */ |
|
|
Tk_Item *itemPtr; /* Text item in which cursor position is to |
|
|
* be set. */ |
|
|
int index; /* Character index of character just before |
|
|
* which cursor is to be positioned. */ |
|
|
{ |
|
|
TextItem *textPtr = (TextItem *) itemPtr; |
|
|
|
|
|
if (index < 0) { |
|
|
textPtr->insertPos = 0; |
|
|
} else if (index > textPtr->numChars) { |
|
|
textPtr->insertPos = textPtr->numChars; |
|
|
} else { |
|
|
textPtr->insertPos = index; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* GetSelText -- |
|
|
* |
|
|
* This procedure is invoked to return the selected portion |
|
|
* of a text item. It is only called when this item has |
|
|
* the selection. |
|
|
* |
|
|
* Results: |
|
|
* The return value is the number of non-NULL bytes stored |
|
|
* at buffer. Buffer is filled (or partially filled) with a |
|
|
* NULL-terminated string containing part or all of the selection, |
|
|
* as given by offset and maxBytes. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
GetSelText(canvas, itemPtr, offset, buffer, maxBytes) |
|
|
Tk_Canvas canvas; /* Canvas containing selection. */ |
|
|
Tk_Item *itemPtr; /* Text item containing selection. */ |
|
|
int offset; /* Byte offset within selection of first |
|
|
* character to be returned. */ |
|
|
char *buffer; /* Location in which to place selection. */ |
|
|
int maxBytes; /* Maximum number of bytes to place at |
|
|
* buffer, not including terminating NULL |
|
|
* character. */ |
|
|
{ |
|
|
TextItem *textPtr = (TextItem *) itemPtr; |
|
|
int byteCount; |
|
|
char *text, *selStart, *selEnd; |
|
|
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; |
|
|
|
|
|
if ((textInfoPtr->selectFirst < 0) || |
|
|
(textInfoPtr->selectFirst > textInfoPtr->selectLast)) { |
|
|
return 0; |
|
|
} |
|
|
text = textPtr->text; |
|
|
selStart = Tcl_UtfAtIndex(text, textInfoPtr->selectFirst); |
|
|
selEnd = Tcl_UtfAtIndex(selStart, |
|
|
textInfoPtr->selectLast + 1 - textInfoPtr->selectFirst); |
|
|
byteCount = selEnd - selStart - offset; |
|
|
if (byteCount > maxBytes) { |
|
|
byteCount = maxBytes; |
|
|
} |
|
|
if (byteCount <= 0) { |
|
|
return 0; |
|
|
} |
|
|
memcpy(buffer, selStart + offset, (size_t) byteCount); |
|
|
buffer[byteCount] = '\0'; |
|
|
return byteCount; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TextToPostscript -- |
|
|
* |
|
|
* This procedure is called to generate Postscript for |
|
|
* text items. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a standard Tcl result. If an error |
|
|
* occurs in generating Postscript then an error message is |
|
|
* left in the interp's result, replacing whatever used |
|
|
* to be there. If no error occurs, then Postscript for the |
|
|
* item is appended to the result. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
TextToPostscript(interp, canvas, itemPtr, prepass) |
|
|
Tcl_Interp *interp; /* Leave Postscript or error message here. */ |
|
|
Tk_Canvas canvas; /* Information about overall canvas. */ |
|
|
Tk_Item *itemPtr; /* Item for which Postscript is wanted. */ |
|
|
int prepass; /* 1 means this is a prepass to collect |
|
|
* font information; 0 means final Postscript |
|
|
* is being created. */ |
|
|
{ |
|
|
TextItem *textPtr = (TextItem *) itemPtr; |
|
|
int x, y; |
|
|
Tk_FontMetrics fm; |
|
|
char *justify; |
|
|
char buffer[500]; |
|
|
XColor *color; |
|
|
Pixmap stipple; |
|
|
Tk_State state = itemPtr->state; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
color = textPtr->color; |
|
|
stipple = textPtr->stipple; |
|
|
if (state == TK_STATE_HIDDEN || textPtr->color == NULL || |
|
|
textPtr->text == NULL || *textPtr->text == 0) { |
|
|
return TCL_OK; |
|
|
} else if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (textPtr->activeColor!=NULL) { |
|
|
color = textPtr->activeColor; |
|
|
} |
|
|
if (textPtr->activeStipple!=None) { |
|
|
stipple = textPtr->activeStipple; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (textPtr->disabledColor!=NULL) { |
|
|
color = textPtr->disabledColor; |
|
|
} |
|
|
if (textPtr->disabledStipple!=None) { |
|
|
stipple = textPtr->disabledStipple; |
|
|
} |
|
|
} |
|
|
|
|
|
if (Tk_CanvasPsFont(interp, canvas, textPtr->tkfont) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (prepass != 0) { |
|
|
return TCL_OK; |
|
|
} |
|
|
if (Tk_CanvasPsColor(interp, canvas, color) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (stipple != None) { |
|
|
Tcl_AppendResult(interp, "/StippleText {\n ", |
|
|
(char *) NULL); |
|
|
Tk_CanvasPsStipple(interp, canvas, stipple); |
|
|
Tcl_AppendResult(interp, "} bind def\n", (char *) NULL); |
|
|
} |
|
|
|
|
|
sprintf(buffer, "%.15g %.15g [\n", textPtr->x, |
|
|
Tk_CanvasPsY(canvas, textPtr->y)); |
|
|
Tcl_AppendResult(interp, buffer, (char *) NULL); |
|
|
|
|
|
Tk_TextLayoutToPostscript(interp, textPtr->textLayout); |
|
|
|
|
|
x = 0; y = 0; justify = NULL; /* lint. */ |
|
|
switch (textPtr->anchor) { |
|
|
case TK_ANCHOR_NW: x = 0; y = 0; break; |
|
|
case TK_ANCHOR_N: x = 1; y = 0; break; |
|
|
case TK_ANCHOR_NE: x = 2; y = 0; break; |
|
|
case TK_ANCHOR_E: x = 2; y = 1; break; |
|
|
case TK_ANCHOR_SE: x = 2; y = 2; break; |
|
|
case TK_ANCHOR_S: x = 1; y = 2; break; |
|
|
case TK_ANCHOR_SW: x = 0; y = 2; break; |
|
|
case TK_ANCHOR_W: x = 0; y = 1; break; |
|
|
case TK_ANCHOR_CENTER: x = 1; y = 1; break; |
|
|
} |
|
|
switch (textPtr->justify) { |
|
|
case TK_JUSTIFY_LEFT: justify = "0"; break; |
|
|
case TK_JUSTIFY_CENTER: justify = "0.5";break; |
|
|
case TK_JUSTIFY_RIGHT: justify = "1"; break; |
|
|
} |
|
|
|
|
|
Tk_GetFontMetrics(textPtr->tkfont, &fm); |
|
|
sprintf(buffer, "] %d %g %g %s %s DrawText\n", |
|
|
fm.linespace, x / -2.0, y / 2.0, justify, |
|
|
((stipple == None) ? "false" : "true")); |
|
|
Tcl_AppendResult(interp, buffer, (char *) NULL); |
|
|
|
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tkCanvText.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 2:42a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TKCANVTEXT.C */ |
|
1 |
|
/* $Header$ */ |
2 |
|
|
3 |
|
/* |
4 |
|
* tkCanvText.c -- |
5 |
|
* |
6 |
|
* This file implements text items for canvas widgets. |
7 |
|
* |
8 |
|
* Copyright (c) 1991-1994 The Regents of the University of California. |
9 |
|
* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
10 |
|
* |
11 |
|
* See the file "license.terms" for information on usage and redistribution |
12 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
13 |
|
* |
14 |
|
* RCS: @(#) $Id: tkcanvtext.c,v 1.1.1.1 2001/06/13 04:57:44 dtashley Exp $ |
15 |
|
*/ |
16 |
|
|
17 |
|
#include <stdio.h> |
18 |
|
#include "tkInt.h" |
19 |
|
#include "tkCanvas.h" |
20 |
|
#include "tkPort.h" |
21 |
|
#include "default.h" |
22 |
|
|
23 |
|
/* |
24 |
|
* The structure below defines the record for each text item. |
25 |
|
*/ |
26 |
|
|
27 |
|
typedef struct TextItem { |
28 |
|
Tk_Item header; /* Generic stuff that's the same for all |
29 |
|
* types. MUST BE FIRST IN STRUCTURE. */ |
30 |
|
Tk_CanvasTextInfo *textInfoPtr; |
31 |
|
/* Pointer to a structure containing |
32 |
|
* information about the selection and |
33 |
|
* insertion cursor. The structure is owned |
34 |
|
* by (and shared with) the generic canvas |
35 |
|
* code. */ |
36 |
|
/* |
37 |
|
* Fields that are set by widget commands other than "configure". |
38 |
|
*/ |
39 |
|
|
40 |
|
double x, y; /* Positioning point for text. */ |
41 |
|
int insertPos; /* Character index of character just before |
42 |
|
* which the insertion cursor is displayed. */ |
43 |
|
|
44 |
|
/* |
45 |
|
* Configuration settings that are updated by Tk_ConfigureWidget. |
46 |
|
*/ |
47 |
|
|
48 |
|
Tk_Anchor anchor; /* Where to anchor text relative to (x,y). */ |
49 |
|
Tk_TSOffset tsoffset; |
50 |
|
XColor *color; /* Color for text. */ |
51 |
|
XColor *activeColor; /* Color for text. */ |
52 |
|
XColor *disabledColor; /* Color for text. */ |
53 |
|
Tk_Font tkfont; /* Font for drawing text. */ |
54 |
|
Tk_Justify justify; /* Justification mode for text. */ |
55 |
|
Pixmap stipple; /* Stipple bitmap for text, or None. */ |
56 |
|
Pixmap activeStipple; /* Stipple bitmap for text, or None. */ |
57 |
|
Pixmap disabledStipple; /* Stipple bitmap for text, or None. */ |
58 |
|
char *text; /* Text for item (malloc-ed). */ |
59 |
|
int width; /* Width of lines for word-wrap, pixels. |
60 |
|
* Zero means no word-wrap. */ |
61 |
|
|
62 |
|
/* |
63 |
|
* Fields whose values are derived from the current values of the |
64 |
|
* configuration settings above. |
65 |
|
*/ |
66 |
|
|
67 |
|
int numChars; /* Length of text in characters. */ |
68 |
|
int numBytes; /* Length of text in bytes. */ |
69 |
|
Tk_TextLayout textLayout; /* Cached text layout information. */ |
70 |
|
int leftEdge; /* Pixel location of the left edge of the |
71 |
|
* text item; where the left border of the |
72 |
|
* text layout is drawn. */ |
73 |
|
int rightEdge; /* Pixel just to right of right edge of |
74 |
|
* area of text item. Used for selecting up |
75 |
|
* to end of line. */ |
76 |
|
GC gc; /* Graphics context for drawing text. */ |
77 |
|
GC selTextGC; /* Graphics context for selected text. */ |
78 |
|
GC cursorOffGC; /* If not None, this gives a graphics context |
79 |
|
* to use to draw the insertion cursor when |
80 |
|
* it's off. Used if the selection and |
81 |
|
* insertion cursor colors are the same. */ |
82 |
|
} TextItem; |
83 |
|
|
84 |
|
/* |
85 |
|
* Information used for parsing configuration specs: |
86 |
|
*/ |
87 |
|
|
88 |
|
static Tk_CustomOption stateOption = { |
89 |
|
(Tk_OptionParseProc *) TkStateParseProc, |
90 |
|
TkStatePrintProc, (ClientData) 2 |
91 |
|
}; |
92 |
|
static Tk_CustomOption tagsOption = { |
93 |
|
(Tk_OptionParseProc *) Tk_CanvasTagsParseProc, |
94 |
|
Tk_CanvasTagsPrintProc, (ClientData) NULL |
95 |
|
}; |
96 |
|
static Tk_CustomOption offsetOption = { |
97 |
|
(Tk_OptionParseProc *) TkOffsetParseProc, |
98 |
|
TkOffsetPrintProc, (ClientData) (TK_OFFSET_RELATIVE) |
99 |
|
}; |
100 |
|
|
101 |
|
static Tk_ConfigSpec configSpecs[] = { |
102 |
|
{TK_CONFIG_COLOR, "-activefill", (char *) NULL, (char *) NULL, |
103 |
|
(char *) NULL, Tk_Offset(TextItem, activeColor), TK_CONFIG_NULL_OK}, |
104 |
|
{TK_CONFIG_BITMAP, "-activestipple", (char *) NULL, (char *) NULL, |
105 |
|
(char *) NULL, Tk_Offset(TextItem, activeStipple), TK_CONFIG_NULL_OK}, |
106 |
|
{TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL, |
107 |
|
"center", Tk_Offset(TextItem, anchor), |
108 |
|
TK_CONFIG_DONT_SET_DEFAULT}, |
109 |
|
{TK_CONFIG_COLOR, "-disabledfill", (char *) NULL, (char *) NULL, |
110 |
|
(char *) NULL, Tk_Offset(TextItem, disabledColor), TK_CONFIG_NULL_OK}, |
111 |
|
{TK_CONFIG_BITMAP, "-disabledstipple", (char *) NULL, (char *) NULL, |
112 |
|
(char *) NULL, Tk_Offset(TextItem, disabledStipple), TK_CONFIG_NULL_OK}, |
113 |
|
{TK_CONFIG_COLOR, "-fill", (char *) NULL, (char *) NULL, |
114 |
|
"black", Tk_Offset(TextItem, color), TK_CONFIG_NULL_OK}, |
115 |
|
{TK_CONFIG_FONT, "-font", (char *) NULL, (char *) NULL, |
116 |
|
DEF_CANVTEXT_FONT, Tk_Offset(TextItem, tkfont), 0}, |
117 |
|
{TK_CONFIG_JUSTIFY, "-justify", (char *) NULL, (char *) NULL, |
118 |
|
"left", Tk_Offset(TextItem, justify), |
119 |
|
TK_CONFIG_DONT_SET_DEFAULT}, |
120 |
|
{TK_CONFIG_CUSTOM, "-offset", (char *) NULL, (char *) NULL, |
121 |
|
"0,0", Tk_Offset(TextItem, tsoffset), |
122 |
|
TK_CONFIG_DONT_SET_DEFAULT, &offsetOption}, |
123 |
|
{TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL, |
124 |
|
(char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, |
125 |
|
&stateOption}, |
126 |
|
{TK_CONFIG_BITMAP, "-stipple", (char *) NULL, (char *) NULL, |
127 |
|
(char *) NULL, Tk_Offset(TextItem, stipple), TK_CONFIG_NULL_OK}, |
128 |
|
{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL, |
129 |
|
(char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, |
130 |
|
{TK_CONFIG_STRING, "-text", (char *) NULL, (char *) NULL, |
131 |
|
"", Tk_Offset(TextItem, text), 0}, |
132 |
|
{TK_CONFIG_PIXELS, "-width", (char *) NULL, (char *) NULL, |
133 |
|
"0", Tk_Offset(TextItem, width), TK_CONFIG_DONT_SET_DEFAULT}, |
134 |
|
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, |
135 |
|
(char *) NULL, 0, 0} |
136 |
|
}; |
137 |
|
|
138 |
|
/* |
139 |
|
* Prototypes for procedures defined in this file: |
140 |
|
*/ |
141 |
|
|
142 |
|
static void ComputeTextBbox _ANSI_ARGS_((Tk_Canvas canvas, |
143 |
|
TextItem *textPtr)); |
144 |
|
static int ConfigureText _ANSI_ARGS_((Tcl_Interp *interp, |
145 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, int argc, |
146 |
|
Tcl_Obj *CONST argv[], int flags)); |
147 |
|
static int CreateText _ANSI_ARGS_((Tcl_Interp *interp, |
148 |
|
Tk_Canvas canvas, struct Tk_Item *itemPtr, |
149 |
|
int argc, Tcl_Obj *CONST argv[])); |
150 |
|
static void DeleteText _ANSI_ARGS_((Tk_Canvas canvas, |
151 |
|
Tk_Item *itemPtr, Display *display)); |
152 |
|
static void DisplayCanvText _ANSI_ARGS_((Tk_Canvas canvas, |
153 |
|
Tk_Item *itemPtr, Display *display, Drawable dst, |
154 |
|
int x, int y, int width, int height)); |
155 |
|
static int GetSelText _ANSI_ARGS_((Tk_Canvas canvas, |
156 |
|
Tk_Item *itemPtr, int offset, char *buffer, |
157 |
|
int maxBytes)); |
158 |
|
static int GetTextIndex _ANSI_ARGS_((Tcl_Interp *interp, |
159 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, |
160 |
|
Tcl_Obj *obj, int *indexPtr)); |
161 |
|
static void ScaleText _ANSI_ARGS_((Tk_Canvas canvas, |
162 |
|
Tk_Item *itemPtr, double originX, double originY, |
163 |
|
double scaleX, double scaleY)); |
164 |
|
static void SetTextCursor _ANSI_ARGS_((Tk_Canvas canvas, |
165 |
|
Tk_Item *itemPtr, int index)); |
166 |
|
static int TextCoords _ANSI_ARGS_((Tcl_Interp *interp, |
167 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, |
168 |
|
int argc, Tcl_Obj *CONST argv[])); |
169 |
|
static void TextDeleteChars _ANSI_ARGS_((Tk_Canvas canvas, |
170 |
|
Tk_Item *itemPtr, int first, int last)); |
171 |
|
static void TextInsert _ANSI_ARGS_((Tk_Canvas canvas, |
172 |
|
Tk_Item *itemPtr, int beforeThis, char *string)); |
173 |
|
static int TextToArea _ANSI_ARGS_((Tk_Canvas canvas, |
174 |
|
Tk_Item *itemPtr, double *rectPtr)); |
175 |
|
static double TextToPoint _ANSI_ARGS_((Tk_Canvas canvas, |
176 |
|
Tk_Item *itemPtr, double *pointPtr)); |
177 |
|
static int TextToPostscript _ANSI_ARGS_((Tcl_Interp *interp, |
178 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, int prepass)); |
179 |
|
static void TranslateText _ANSI_ARGS_((Tk_Canvas canvas, |
180 |
|
Tk_Item *itemPtr, double deltaX, double deltaY)); |
181 |
|
|
182 |
|
/* |
183 |
|
* The structures below defines the rectangle and oval item types |
184 |
|
* by means of procedures that can be invoked by generic item code. |
185 |
|
*/ |
186 |
|
|
187 |
|
Tk_ItemType tkTextType = { |
188 |
|
"text", /* name */ |
189 |
|
sizeof(TextItem), /* itemSize */ |
190 |
|
CreateText, /* createProc */ |
191 |
|
configSpecs, /* configSpecs */ |
192 |
|
ConfigureText, /* configureProc */ |
193 |
|
TextCoords, /* coordProc */ |
194 |
|
DeleteText, /* deleteProc */ |
195 |
|
DisplayCanvText, /* displayProc */ |
196 |
|
TK_CONFIG_OBJS, /* flags */ |
197 |
|
TextToPoint, /* pointProc */ |
198 |
|
TextToArea, /* areaProc */ |
199 |
|
TextToPostscript, /* postscriptProc */ |
200 |
|
ScaleText, /* scaleProc */ |
201 |
|
TranslateText, /* translateProc */ |
202 |
|
(Tk_ItemIndexProc *) GetTextIndex,/* indexProc */ |
203 |
|
SetTextCursor, /* icursorProc */ |
204 |
|
GetSelText, /* selectionProc */ |
205 |
|
TextInsert, /* insertProc */ |
206 |
|
TextDeleteChars, /* dTextProc */ |
207 |
|
(Tk_ItemType *) NULL, /* nextPtr */ |
208 |
|
}; |
209 |
|
|
210 |
|
/* |
211 |
|
*-------------------------------------------------------------- |
212 |
|
* |
213 |
|
* CreateText -- |
214 |
|
* |
215 |
|
* This procedure is invoked to create a new text item |
216 |
|
* in a canvas. |
217 |
|
* |
218 |
|
* Results: |
219 |
|
* A standard Tcl return value. If an error occurred in |
220 |
|
* creating the item then an error message is left in |
221 |
|
* the interp's result; in this case itemPtr is left uninitialized |
222 |
|
* so it can be safely freed by the caller. |
223 |
|
* |
224 |
|
* Side effects: |
225 |
|
* A new text item is created. |
226 |
|
* |
227 |
|
*-------------------------------------------------------------- |
228 |
|
*/ |
229 |
|
|
230 |
|
static int |
231 |
|
CreateText(interp, canvas, itemPtr, argc, argv) |
232 |
|
Tcl_Interp *interp; /* Interpreter for error reporting. */ |
233 |
|
Tk_Canvas canvas; /* Canvas to hold new item. */ |
234 |
|
Tk_Item *itemPtr; /* Record to hold new item; header has been |
235 |
|
* initialized by caller. */ |
236 |
|
int argc; /* Number of arguments in argv. */ |
237 |
|
Tcl_Obj *CONST argv[]; /* Arguments describing rectangle. */ |
238 |
|
{ |
239 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
240 |
|
int i; |
241 |
|
|
242 |
|
if (argc==1) { |
243 |
|
i = 1; |
244 |
|
} else { |
245 |
|
char *arg = Tcl_GetStringFromObj(argv[1], NULL); |
246 |
|
if ((argc>1) && (arg[0] == '-') |
247 |
|
&& (arg[1] >= 'a') && (arg[1] <= 'z')) { |
248 |
|
i = 1; |
249 |
|
} else { |
250 |
|
i = 2; |
251 |
|
} |
252 |
|
} |
253 |
|
|
254 |
|
if (argc < i) { |
255 |
|
Tcl_AppendResult(interp, "wrong # args: should be \"", |
256 |
|
Tk_PathName(Tk_CanvasTkwin(canvas)), " create ", |
257 |
|
itemPtr->typePtr->name, " x y ?options?\"", (char *) NULL); |
258 |
|
return TCL_ERROR; |
259 |
|
} |
260 |
|
|
261 |
|
/* |
262 |
|
* Carry out initialization that is needed in order to clean up after |
263 |
|
* errors during the the remainder of this procedure. |
264 |
|
*/ |
265 |
|
|
266 |
|
textPtr->textInfoPtr = Tk_CanvasGetTextInfo(canvas); |
267 |
|
|
268 |
|
textPtr->insertPos = 0; |
269 |
|
|
270 |
|
textPtr->anchor = TK_ANCHOR_CENTER; |
271 |
|
textPtr->tsoffset.flags = 0; |
272 |
|
textPtr->tsoffset.xoffset = 0; |
273 |
|
textPtr->tsoffset.yoffset = 0; |
274 |
|
textPtr->color = NULL; |
275 |
|
textPtr->activeColor = NULL; |
276 |
|
textPtr->disabledColor = NULL; |
277 |
|
textPtr->tkfont = NULL; |
278 |
|
textPtr->justify = TK_JUSTIFY_LEFT; |
279 |
|
textPtr->stipple = None; |
280 |
|
textPtr->activeStipple = None; |
281 |
|
textPtr->disabledStipple = None; |
282 |
|
textPtr->text = NULL; |
283 |
|
textPtr->width = 0; |
284 |
|
|
285 |
|
textPtr->numChars = 0; |
286 |
|
textPtr->numBytes = 0; |
287 |
|
textPtr->textLayout = NULL; |
288 |
|
textPtr->leftEdge = 0; |
289 |
|
textPtr->rightEdge = 0; |
290 |
|
textPtr->gc = None; |
291 |
|
textPtr->selTextGC = None; |
292 |
|
textPtr->cursorOffGC = None; |
293 |
|
|
294 |
|
/* |
295 |
|
* Process the arguments to fill in the item record. |
296 |
|
*/ |
297 |
|
|
298 |
|
if ((TextCoords(interp, canvas, itemPtr, i, argv) != TCL_OK)) { |
299 |
|
goto error; |
300 |
|
} |
301 |
|
if (ConfigureText(interp, canvas, itemPtr, argc-i, argv+i, 0) == TCL_OK) { |
302 |
|
return TCL_OK; |
303 |
|
} |
304 |
|
|
305 |
|
error: |
306 |
|
DeleteText(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas))); |
307 |
|
return TCL_ERROR; |
308 |
|
} |
309 |
|
|
310 |
|
/* |
311 |
|
*-------------------------------------------------------------- |
312 |
|
* |
313 |
|
* TextCoords -- |
314 |
|
* |
315 |
|
* This procedure is invoked to process the "coords" widget |
316 |
|
* command on text items. See the user documentation for |
317 |
|
* details on what it does. |
318 |
|
* |
319 |
|
* Results: |
320 |
|
* Returns TCL_OK or TCL_ERROR, and sets the interp's result. |
321 |
|
* |
322 |
|
* Side effects: |
323 |
|
* The coordinates for the given item may be changed. |
324 |
|
* |
325 |
|
*-------------------------------------------------------------- |
326 |
|
*/ |
327 |
|
|
328 |
|
static int |
329 |
|
TextCoords(interp, canvas, itemPtr, argc, argv) |
330 |
|
Tcl_Interp *interp; /* Used for error reporting. */ |
331 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
332 |
|
Tk_Item *itemPtr; /* Item whose coordinates are to be read or |
333 |
|
* modified. */ |
334 |
|
int argc; /* Number of coordinates supplied in argv. */ |
335 |
|
Tcl_Obj *CONST argv[]; /* Array of coordinates: x1, y1, x2, y2, ... */ |
336 |
|
{ |
337 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
338 |
|
|
339 |
|
if (argc == 0) { |
340 |
|
Tcl_Obj *obj = Tcl_NewObj(); |
341 |
|
Tcl_Obj *subobj = Tcl_NewDoubleObj(textPtr->x); |
342 |
|
Tcl_ListObjAppendElement(interp, obj, subobj); |
343 |
|
subobj = Tcl_NewDoubleObj(textPtr->y); |
344 |
|
Tcl_ListObjAppendElement(interp, obj, subobj); |
345 |
|
Tcl_SetObjResult(interp, obj); |
346 |
|
} else if (argc < 3) { |
347 |
|
if (argc==1) { |
348 |
|
if (Tcl_ListObjGetElements(interp, argv[0], &argc, |
349 |
|
(Tcl_Obj ***) &argv) != TCL_OK) { |
350 |
|
return TCL_ERROR; |
351 |
|
} else if (argc != 2) { |
352 |
|
char buf[64 + TCL_INTEGER_SPACE]; |
353 |
|
|
354 |
|
sprintf(buf, "wrong # coordinates: expected 2, got %d", argc); |
355 |
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
356 |
|
return TCL_ERROR; |
357 |
|
} |
358 |
|
} |
359 |
|
if ((Tk_CanvasGetCoordFromObj(interp, canvas, argv[0], &textPtr->x) != TCL_OK) |
360 |
|
|| (Tk_CanvasGetCoordFromObj(interp, canvas, argv[1], |
361 |
|
&textPtr->y) != TCL_OK)) { |
362 |
|
return TCL_ERROR; |
363 |
|
} |
364 |
|
ComputeTextBbox(canvas, textPtr); |
365 |
|
} else { |
366 |
|
char buf[64 + TCL_INTEGER_SPACE]; |
367 |
|
|
368 |
|
sprintf(buf, "wrong # coordinates: expected 0 or 2, got %d", argc); |
369 |
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
370 |
|
return TCL_ERROR; |
371 |
|
} |
372 |
|
return TCL_OK; |
373 |
|
} |
374 |
|
|
375 |
|
/* |
376 |
|
*-------------------------------------------------------------- |
377 |
|
* |
378 |
|
* ConfigureText -- |
379 |
|
* |
380 |
|
* This procedure is invoked to configure various aspects |
381 |
|
* of a text item, such as its border and background colors. |
382 |
|
* |
383 |
|
* Results: |
384 |
|
* A standard Tcl result code. If an error occurs, then |
385 |
|
* an error message is left in the interp's result. |
386 |
|
* |
387 |
|
* Side effects: |
388 |
|
* Configuration information, such as colors and stipple |
389 |
|
* patterns, may be set for itemPtr. |
390 |
|
* |
391 |
|
*-------------------------------------------------------------- |
392 |
|
*/ |
393 |
|
|
394 |
|
static int |
395 |
|
ConfigureText(interp, canvas, itemPtr, argc, argv, flags) |
396 |
|
Tcl_Interp *interp; /* Interpreter for error reporting. */ |
397 |
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
398 |
|
Tk_Item *itemPtr; /* Rectangle item to reconfigure. */ |
399 |
|
int argc; /* Number of elements in argv. */ |
400 |
|
Tcl_Obj *CONST argv[]; /* Arguments describing things to configure. */ |
401 |
|
int flags; /* Flags to pass to Tk_ConfigureWidget. */ |
402 |
|
{ |
403 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
404 |
|
XGCValues gcValues; |
405 |
|
GC newGC, newSelGC; |
406 |
|
unsigned long mask; |
407 |
|
Tk_Window tkwin; |
408 |
|
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; |
409 |
|
XColor *selBgColorPtr; |
410 |
|
XColor *color; |
411 |
|
Pixmap stipple; |
412 |
|
Tk_State state; |
413 |
|
|
414 |
|
tkwin = Tk_CanvasTkwin(canvas); |
415 |
|
if (Tk_ConfigureWidget(interp, tkwin, configSpecs, argc, (char **) argv, |
416 |
|
(char *) textPtr, flags|TK_CONFIG_OBJS) != TCL_OK) { |
417 |
|
return TCL_ERROR; |
418 |
|
} |
419 |
|
|
420 |
|
/* |
421 |
|
* A few of the options require additional processing, such as |
422 |
|
* graphics contexts. |
423 |
|
*/ |
424 |
|
|
425 |
|
state = itemPtr->state; |
426 |
|
|
427 |
|
if (textPtr->activeColor != NULL || |
428 |
|
textPtr->activeStipple != None) { |
429 |
|
itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT; |
430 |
|
} else { |
431 |
|
itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT; |
432 |
|
} |
433 |
|
|
434 |
|
if(state == TK_STATE_NULL) { |
435 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
436 |
|
} |
437 |
|
|
438 |
|
color = textPtr->color; |
439 |
|
stipple = textPtr->stipple; |
440 |
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
441 |
|
if (textPtr->activeColor!=NULL) { |
442 |
|
color = textPtr->activeColor; |
443 |
|
} |
444 |
|
if (textPtr->activeStipple!=None) { |
445 |
|
stipple = textPtr->activeStipple; |
446 |
|
} |
447 |
|
} else if (state==TK_STATE_DISABLED) { |
448 |
|
if (textPtr->disabledColor!=NULL) { |
449 |
|
color = textPtr->disabledColor; |
450 |
|
} |
451 |
|
if (textPtr->disabledStipple!=None) { |
452 |
|
stipple = textPtr->disabledStipple; |
453 |
|
} |
454 |
|
} |
455 |
|
|
456 |
|
newGC = newSelGC = None; |
457 |
|
if (textPtr->tkfont != NULL) { |
458 |
|
gcValues.font = Tk_FontId(textPtr->tkfont); |
459 |
|
mask = GCFont; |
460 |
|
if (color != NULL) { |
461 |
|
gcValues.foreground = color->pixel; |
462 |
|
mask |= GCForeground; |
463 |
|
if (stipple != None) { |
464 |
|
gcValues.stipple = stipple; |
465 |
|
gcValues.fill_style = FillStippled; |
466 |
|
mask |= GCStipple|GCFillStyle; |
467 |
|
} |
468 |
|
newGC = Tk_GetGC(tkwin, mask, &gcValues); |
469 |
|
} |
470 |
|
mask &= ~(GCTile|GCFillStyle|GCStipple); |
471 |
|
if (stipple != None) { |
472 |
|
gcValues.stipple = stipple; |
473 |
|
gcValues.fill_style = FillStippled; |
474 |
|
mask |= GCStipple|GCFillStyle; |
475 |
|
} |
476 |
|
gcValues.foreground = textInfoPtr->selFgColorPtr->pixel; |
477 |
|
newSelGC = Tk_GetGC(tkwin, mask|GCForeground, &gcValues); |
478 |
|
} |
479 |
|
if (textPtr->gc != None) { |
480 |
|
Tk_FreeGC(Tk_Display(tkwin), textPtr->gc); |
481 |
|
} |
482 |
|
textPtr->gc = newGC; |
483 |
|
if (textPtr->selTextGC != None) { |
484 |
|
Tk_FreeGC(Tk_Display(tkwin), textPtr->selTextGC); |
485 |
|
} |
486 |
|
textPtr->selTextGC = newSelGC; |
487 |
|
|
488 |
|
selBgColorPtr = Tk_3DBorderColor(textInfoPtr->selBorder); |
489 |
|
if (Tk_3DBorderColor(textInfoPtr->insertBorder)->pixel |
490 |
|
== selBgColorPtr->pixel) { |
491 |
|
if (selBgColorPtr->pixel == BlackPixelOfScreen(Tk_Screen(tkwin))) { |
492 |
|
gcValues.foreground = WhitePixelOfScreen(Tk_Screen(tkwin)); |
493 |
|
} else { |
494 |
|
gcValues.foreground = BlackPixelOfScreen(Tk_Screen(tkwin)); |
495 |
|
} |
496 |
|
newGC = Tk_GetGC(tkwin, GCForeground, &gcValues); |
497 |
|
} else { |
498 |
|
newGC = None; |
499 |
|
} |
500 |
|
if (textPtr->cursorOffGC != None) { |
501 |
|
Tk_FreeGC(Tk_Display(tkwin), textPtr->cursorOffGC); |
502 |
|
} |
503 |
|
textPtr->cursorOffGC = newGC; |
504 |
|
|
505 |
|
|
506 |
|
/* |
507 |
|
* If the text was changed, move the selection and insertion indices |
508 |
|
* to keep them inside the item. |
509 |
|
*/ |
510 |
|
|
511 |
|
textPtr->numBytes = strlen(textPtr->text); |
512 |
|
textPtr->numChars = Tcl_NumUtfChars(textPtr->text, textPtr->numBytes); |
513 |
|
if (textInfoPtr->selItemPtr == itemPtr) { |
514 |
|
|
515 |
|
if (textInfoPtr->selectFirst >= textPtr->numChars) { |
516 |
|
textInfoPtr->selItemPtr = NULL; |
517 |
|
} else { |
518 |
|
if (textInfoPtr->selectLast >= textPtr->numChars) { |
519 |
|
textInfoPtr->selectLast = textPtr->numChars - 1; |
520 |
|
} |
521 |
|
if ((textInfoPtr->anchorItemPtr == itemPtr) |
522 |
|
&& (textInfoPtr->selectAnchor >= textPtr->numChars)) { |
523 |
|
textInfoPtr->selectAnchor = textPtr->numChars - 1; |
524 |
|
} |
525 |
|
} |
526 |
|
} |
527 |
|
if (textPtr->insertPos >= textPtr->numChars) { |
528 |
|
textPtr->insertPos = textPtr->numChars; |
529 |
|
} |
530 |
|
|
531 |
|
ComputeTextBbox(canvas, textPtr); |
532 |
|
return TCL_OK; |
533 |
|
} |
534 |
|
|
535 |
|
/* |
536 |
|
*-------------------------------------------------------------- |
537 |
|
* |
538 |
|
* DeleteText -- |
539 |
|
* |
540 |
|
* This procedure is called to clean up the data structure |
541 |
|
* associated with a text item. |
542 |
|
* |
543 |
|
* Results: |
544 |
|
* None. |
545 |
|
* |
546 |
|
* Side effects: |
547 |
|
* Resources associated with itemPtr are released. |
548 |
|
* |
549 |
|
*-------------------------------------------------------------- |
550 |
|
*/ |
551 |
|
|
552 |
|
static void |
553 |
|
DeleteText(canvas, itemPtr, display) |
554 |
|
Tk_Canvas canvas; /* Info about overall canvas widget. */ |
555 |
|
Tk_Item *itemPtr; /* Item that is being deleted. */ |
556 |
|
Display *display; /* Display containing window for canvas. */ |
557 |
|
{ |
558 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
559 |
|
|
560 |
|
if (textPtr->color != NULL) { |
561 |
|
Tk_FreeColor(textPtr->color); |
562 |
|
} |
563 |
|
if (textPtr->activeColor != NULL) { |
564 |
|
Tk_FreeColor(textPtr->activeColor); |
565 |
|
} |
566 |
|
if (textPtr->disabledColor != NULL) { |
567 |
|
Tk_FreeColor(textPtr->disabledColor); |
568 |
|
} |
569 |
|
Tk_FreeFont(textPtr->tkfont); |
570 |
|
if (textPtr->stipple != None) { |
571 |
|
Tk_FreeBitmap(display, textPtr->stipple); |
572 |
|
} |
573 |
|
if (textPtr->activeStipple != None) { |
574 |
|
Tk_FreeBitmap(display, textPtr->activeStipple); |
575 |
|
} |
576 |
|
if (textPtr->disabledStipple != None) { |
577 |
|
Tk_FreeBitmap(display, textPtr->disabledStipple); |
578 |
|
} |
579 |
|
if (textPtr->text != NULL) { |
580 |
|
ckfree(textPtr->text); |
581 |
|
} |
582 |
|
|
583 |
|
Tk_FreeTextLayout(textPtr->textLayout); |
584 |
|
if (textPtr->gc != None) { |
585 |
|
Tk_FreeGC(display, textPtr->gc); |
586 |
|
} |
587 |
|
if (textPtr->selTextGC != None) { |
588 |
|
Tk_FreeGC(display, textPtr->selTextGC); |
589 |
|
} |
590 |
|
if (textPtr->cursorOffGC != None) { |
591 |
|
Tk_FreeGC(display, textPtr->cursorOffGC); |
592 |
|
} |
593 |
|
} |
594 |
|
|
595 |
|
/* |
596 |
|
*-------------------------------------------------------------- |
597 |
|
* |
598 |
|
* ComputeTextBbox -- |
599 |
|
* |
600 |
|
* This procedure is invoked to compute the bounding box of |
601 |
|
* all the pixels that may be drawn as part of a text item. |
602 |
|
* In addition, it recomputes all of the geometry information |
603 |
|
* used to display a text item or check for mouse hits. |
604 |
|
* |
605 |
|
* Results: |
606 |
|
* None. |
607 |
|
* |
608 |
|
* Side effects: |
609 |
|
* The fields x1, y1, x2, and y2 are updated in the header |
610 |
|
* for itemPtr, and the linePtr structure is regenerated |
611 |
|
* for itemPtr. |
612 |
|
* |
613 |
|
*-------------------------------------------------------------- |
614 |
|
*/ |
615 |
|
|
616 |
|
static void |
617 |
|
ComputeTextBbox(canvas, textPtr) |
618 |
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
619 |
|
TextItem *textPtr; /* Item whose bbox is to be recomputed. */ |
620 |
|
{ |
621 |
|
Tk_CanvasTextInfo *textInfoPtr; |
622 |
|
int leftX, topY, width, height, fudge; |
623 |
|
Tk_State state = textPtr->header.state; |
624 |
|
|
625 |
|
if(state == TK_STATE_NULL) { |
626 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
627 |
|
} |
628 |
|
|
629 |
|
Tk_FreeTextLayout(textPtr->textLayout); |
630 |
|
textPtr->textLayout = Tk_ComputeTextLayout(textPtr->tkfont, |
631 |
|
textPtr->text, textPtr->numChars, textPtr->width, |
632 |
|
textPtr->justify, 0, &width, &height); |
633 |
|
|
634 |
|
if (state == TK_STATE_HIDDEN || textPtr->color == NULL) { |
635 |
|
width = height = 0; |
636 |
|
} |
637 |
|
|
638 |
|
/* |
639 |
|
* Use overall geometry information to compute the top-left corner |
640 |
|
* of the bounding box for the text item. |
641 |
|
*/ |
642 |
|
|
643 |
|
leftX = (int) (textPtr->x + 0.5); |
644 |
|
topY = (int) (textPtr->y + 0.5); |
645 |
|
switch (textPtr->anchor) { |
646 |
|
case TK_ANCHOR_NW: |
647 |
|
case TK_ANCHOR_N: |
648 |
|
case TK_ANCHOR_NE: |
649 |
|
break; |
650 |
|
|
651 |
|
case TK_ANCHOR_W: |
652 |
|
case TK_ANCHOR_CENTER: |
653 |
|
case TK_ANCHOR_E: |
654 |
|
topY -= height / 2; |
655 |
|
break; |
656 |
|
|
657 |
|
case TK_ANCHOR_SW: |
658 |
|
case TK_ANCHOR_S: |
659 |
|
case TK_ANCHOR_SE: |
660 |
|
topY -= height; |
661 |
|
break; |
662 |
|
} |
663 |
|
switch (textPtr->anchor) { |
664 |
|
case TK_ANCHOR_NW: |
665 |
|
case TK_ANCHOR_W: |
666 |
|
case TK_ANCHOR_SW: |
667 |
|
break; |
668 |
|
|
669 |
|
case TK_ANCHOR_N: |
670 |
|
case TK_ANCHOR_CENTER: |
671 |
|
case TK_ANCHOR_S: |
672 |
|
leftX -= width / 2; |
673 |
|
break; |
674 |
|
|
675 |
|
case TK_ANCHOR_NE: |
676 |
|
case TK_ANCHOR_E: |
677 |
|
case TK_ANCHOR_SE: |
678 |
|
leftX -= width; |
679 |
|
break; |
680 |
|
} |
681 |
|
|
682 |
|
textPtr->leftEdge = leftX; |
683 |
|
textPtr->rightEdge = leftX + width; |
684 |
|
|
685 |
|
/* |
686 |
|
* Last of all, update the bounding box for the item. The item's |
687 |
|
* bounding box includes the bounding box of all its lines, plus |
688 |
|
* an extra fudge factor for the cursor border (which could |
689 |
|
* potentially be quite large). |
690 |
|
*/ |
691 |
|
|
692 |
|
textInfoPtr = textPtr->textInfoPtr; |
693 |
|
fudge = (textInfoPtr->insertWidth + 1) / 2; |
694 |
|
if (textInfoPtr->selBorderWidth > fudge) { |
695 |
|
fudge = textInfoPtr->selBorderWidth; |
696 |
|
} |
697 |
|
textPtr->header.x1 = leftX - fudge; |
698 |
|
textPtr->header.y1 = topY; |
699 |
|
textPtr->header.x2 = leftX + width + fudge; |
700 |
|
textPtr->header.y2 = topY + height; |
701 |
|
} |
702 |
|
|
703 |
|
/* |
704 |
|
*-------------------------------------------------------------- |
705 |
|
* |
706 |
|
* DisplayCanvText -- |
707 |
|
* |
708 |
|
* This procedure is invoked to draw a text item in a given |
709 |
|
* drawable. |
710 |
|
* |
711 |
|
* Results: |
712 |
|
* None. |
713 |
|
* |
714 |
|
* Side effects: |
715 |
|
* ItemPtr is drawn in drawable using the transformation |
716 |
|
* information in canvas. |
717 |
|
* |
718 |
|
*-------------------------------------------------------------- |
719 |
|
*/ |
720 |
|
|
721 |
|
static void |
722 |
|
DisplayCanvText(canvas, itemPtr, display, drawable, x, y, width, height) |
723 |
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
724 |
|
Tk_Item *itemPtr; /* Item to be displayed. */ |
725 |
|
Display *display; /* Display on which to draw item. */ |
726 |
|
Drawable drawable; /* Pixmap or window in which to draw item. */ |
727 |
|
int x, y, width, height; /* Describes region of canvas that must be |
728 |
|
* redisplayed (not used). */ |
729 |
|
{ |
730 |
|
TextItem *textPtr; |
731 |
|
Tk_CanvasTextInfo *textInfoPtr; |
732 |
|
int selFirstChar, selLastChar; |
733 |
|
short drawableX, drawableY; |
734 |
|
Pixmap stipple; |
735 |
|
Tk_State state = itemPtr->state; |
736 |
|
|
737 |
|
textPtr = (TextItem *) itemPtr; |
738 |
|
textInfoPtr = textPtr->textInfoPtr; |
739 |
|
|
740 |
|
if(state == TK_STATE_NULL) { |
741 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
742 |
|
} |
743 |
|
stipple = textPtr->stipple; |
744 |
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
745 |
|
if (textPtr->activeStipple!=None) { |
746 |
|
stipple = textPtr->activeStipple; |
747 |
|
} |
748 |
|
} else if (state==TK_STATE_DISABLED) { |
749 |
|
if (textPtr->disabledStipple!=None) { |
750 |
|
stipple = textPtr->disabledStipple; |
751 |
|
} |
752 |
|
} |
753 |
|
|
754 |
|
if (textPtr->gc == None) { |
755 |
|
return; |
756 |
|
} |
757 |
|
|
758 |
|
/* |
759 |
|
* If we're stippling, then modify the stipple offset in the GC. Be |
760 |
|
* sure to reset the offset when done, since the GC is supposed to be |
761 |
|
* read-only. |
762 |
|
*/ |
763 |
|
|
764 |
|
if (stipple != None) { |
765 |
|
Tk_CanvasSetOffset(canvas, textPtr->gc, &textPtr->tsoffset); |
766 |
|
} |
767 |
|
|
768 |
|
selFirstChar = -1; |
769 |
|
selLastChar = 0; /* lint. */ |
770 |
|
|
771 |
|
if (textInfoPtr->selItemPtr == itemPtr) { |
772 |
|
selFirstChar = textInfoPtr->selectFirst; |
773 |
|
selLastChar = textInfoPtr->selectLast; |
774 |
|
if (selLastChar > textPtr->numChars) { |
775 |
|
selLastChar = textPtr->numChars - 1; |
776 |
|
} |
777 |
|
if ((selFirstChar >= 0) && (selFirstChar <= selLastChar)) { |
778 |
|
int xFirst, yFirst, hFirst; |
779 |
|
int xLast, yLast; |
780 |
|
|
781 |
|
/* |
782 |
|
* Draw a special background under the selection. |
783 |
|
*/ |
784 |
|
|
785 |
|
Tk_CharBbox(textPtr->textLayout, selFirstChar, &xFirst, &yFirst, |
786 |
|
NULL, &hFirst); |
787 |
|
Tk_CharBbox(textPtr->textLayout, selLastChar, &xLast, &yLast, |
788 |
|
NULL, NULL); |
789 |
|
|
790 |
|
/* |
791 |
|
* If the selection spans the end of this line, then display |
792 |
|
* selection background all the way to the end of the line. |
793 |
|
* However, for the last line we only want to display up to the |
794 |
|
* last character, not the end of the line. |
795 |
|
*/ |
796 |
|
|
797 |
|
x = xFirst; |
798 |
|
height = hFirst; |
799 |
|
for (y = yFirst ; y <= yLast; y += height) { |
800 |
|
if (y == yLast) { |
801 |
|
width = xLast - x; |
802 |
|
} else { |
803 |
|
width = textPtr->rightEdge - textPtr->leftEdge - x; |
804 |
|
} |
805 |
|
Tk_CanvasDrawableCoords(canvas, |
806 |
|
(double) (textPtr->leftEdge + x |
807 |
|
- textInfoPtr->selBorderWidth), |
808 |
|
(double) (textPtr->header.y1 + y), |
809 |
|
&drawableX, &drawableY); |
810 |
|
Tk_Fill3DRectangle(Tk_CanvasTkwin(canvas), drawable, |
811 |
|
textInfoPtr->selBorder, drawableX, drawableY, |
812 |
|
width + 2 * textInfoPtr->selBorderWidth, |
813 |
|
height, textInfoPtr->selBorderWidth, TK_RELIEF_RAISED); |
814 |
|
x = 0; |
815 |
|
} |
816 |
|
} |
817 |
|
} |
818 |
|
|
819 |
|
/* |
820 |
|
* If the insertion point should be displayed, then draw a special |
821 |
|
* background for the cursor before drawing the text. Note: if |
822 |
|
* we're the cursor item but the cursor is turned off, then redraw |
823 |
|
* background over the area of the cursor. This guarantees that |
824 |
|
* the selection won't make the cursor invisible on mono displays, |
825 |
|
* where both are drawn in the same color. |
826 |
|
*/ |
827 |
|
|
828 |
|
if ((textInfoPtr->focusItemPtr == itemPtr) && (textInfoPtr->gotFocus)) { |
829 |
|
if (Tk_CharBbox(textPtr->textLayout, textPtr->insertPos, |
830 |
|
&x, &y, NULL, &height)) { |
831 |
|
Tk_CanvasDrawableCoords(canvas, |
832 |
|
(double) (textPtr->leftEdge + x |
833 |
|
- (textInfoPtr->insertWidth / 2)), |
834 |
|
(double) (textPtr->header.y1 + y), |
835 |
|
&drawableX, &drawableY); |
836 |
|
if (textInfoPtr->cursorOn) { |
837 |
|
Tk_Fill3DRectangle(Tk_CanvasTkwin(canvas), drawable, |
838 |
|
textInfoPtr->insertBorder, |
839 |
|
drawableX, drawableY, |
840 |
|
textInfoPtr->insertWidth, height, |
841 |
|
textInfoPtr->insertBorderWidth, TK_RELIEF_RAISED); |
842 |
|
} else if (textPtr->cursorOffGC != None) { |
843 |
|
/* |
844 |
|
* Redraw the background over the area of the cursor, |
845 |
|
* even though the cursor is turned off. This |
846 |
|
* guarantees that the selection won't make the cursor |
847 |
|
* invisible on mono displays, where both may be drawn |
848 |
|
* in the same color. |
849 |
|
*/ |
850 |
|
|
851 |
|
XFillRectangle(display, drawable, textPtr->cursorOffGC, |
852 |
|
drawableX, drawableY, |
853 |
|
(unsigned) textInfoPtr->insertWidth, |
854 |
|
(unsigned) height); |
855 |
|
} |
856 |
|
} |
857 |
|
} |
858 |
|
|
859 |
|
|
860 |
|
/* |
861 |
|
* Display the text in two pieces: draw the entire text item, then |
862 |
|
* draw the selected text on top of it. The selected text then |
863 |
|
* will only need to be drawn if it has different attributes (such |
864 |
|
* as foreground color) than regular text. |
865 |
|
*/ |
866 |
|
|
867 |
|
Tk_CanvasDrawableCoords(canvas, (double) textPtr->leftEdge, |
868 |
|
(double) textPtr->header.y1, &drawableX, &drawableY); |
869 |
|
Tk_DrawTextLayout(display, drawable, textPtr->gc, textPtr->textLayout, |
870 |
|
drawableX, drawableY, 0, -1); |
871 |
|
|
872 |
|
if ((selFirstChar >= 0) && (textPtr->selTextGC != textPtr->gc)) { |
873 |
|
Tk_DrawTextLayout(display, drawable, textPtr->selTextGC, |
874 |
|
textPtr->textLayout, drawableX, drawableY, selFirstChar, |
875 |
|
selLastChar + 1); |
876 |
|
} |
877 |
|
|
878 |
|
if (stipple != None) { |
879 |
|
XSetTSOrigin(display, textPtr->gc, 0, 0); |
880 |
|
} |
881 |
|
} |
882 |
|
|
883 |
|
/* |
884 |
|
*-------------------------------------------------------------- |
885 |
|
* |
886 |
|
* TextInsert -- |
887 |
|
* |
888 |
|
* Insert characters into a text item at a given position. |
889 |
|
* |
890 |
|
* Results: |
891 |
|
* None. |
892 |
|
* |
893 |
|
* Side effects: |
894 |
|
* The text in the given item is modified. The cursor and |
895 |
|
* selection positions are also modified to reflect the |
896 |
|
* insertion. |
897 |
|
* |
898 |
|
*-------------------------------------------------------------- |
899 |
|
*/ |
900 |
|
|
901 |
|
static void |
902 |
|
TextInsert(canvas, itemPtr, index, string) |
903 |
|
Tk_Canvas canvas; /* Canvas containing text item. */ |
904 |
|
Tk_Item *itemPtr; /* Text item to be modified. */ |
905 |
|
int index; /* Character index before which string is |
906 |
|
* to be inserted. */ |
907 |
|
char *string; /* New characters to be inserted. */ |
908 |
|
{ |
909 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
910 |
|
int byteIndex, byteCount, charsAdded; |
911 |
|
char *new, *text; |
912 |
|
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; |
913 |
|
|
914 |
|
string = Tcl_GetStringFromObj((Tcl_Obj *) string, &byteCount); |
915 |
|
|
916 |
|
text = textPtr->text; |
917 |
|
|
918 |
|
if (index < 0) { |
919 |
|
index = 0; |
920 |
|
} |
921 |
|
if (index > textPtr->numChars) { |
922 |
|
index = textPtr->numChars; |
923 |
|
} |
924 |
|
byteIndex = Tcl_UtfAtIndex(text, index) - text; |
925 |
|
byteCount = strlen(string); |
926 |
|
if (byteCount == 0) { |
927 |
|
return; |
928 |
|
} |
929 |
|
|
930 |
|
new = (char *) ckalloc((unsigned) textPtr->numBytes + byteCount + 1); |
931 |
|
memcpy(new, text, (size_t) byteIndex); |
932 |
|
strcpy(new + byteIndex, string); |
933 |
|
strcpy(new + byteIndex + byteCount, text + byteIndex); |
934 |
|
|
935 |
|
ckfree(text); |
936 |
|
textPtr->text = new; |
937 |
|
charsAdded = Tcl_NumUtfChars(string, byteCount); |
938 |
|
textPtr->numChars += charsAdded; |
939 |
|
textPtr->numBytes += byteCount; |
940 |
|
|
941 |
|
/* |
942 |
|
* Inserting characters invalidates indices such as those for the |
943 |
|
* selection and cursor. Update the indices appropriately. |
944 |
|
*/ |
945 |
|
|
946 |
|
if (textInfoPtr->selItemPtr == itemPtr) { |
947 |
|
if (textInfoPtr->selectFirst >= index) { |
948 |
|
textInfoPtr->selectFirst += charsAdded; |
949 |
|
} |
950 |
|
if (textInfoPtr->selectLast >= index) { |
951 |
|
textInfoPtr->selectLast += charsAdded; |
952 |
|
} |
953 |
|
if ((textInfoPtr->anchorItemPtr == itemPtr) |
954 |
|
&& (textInfoPtr->selectAnchor >= index)) { |
955 |
|
textInfoPtr->selectAnchor += charsAdded; |
956 |
|
} |
957 |
|
} |
958 |
|
if (textPtr->insertPos >= index) { |
959 |
|
textPtr->insertPos += charsAdded; |
960 |
|
} |
961 |
|
ComputeTextBbox(canvas, textPtr); |
962 |
|
} |
963 |
|
|
964 |
|
/* |
965 |
|
*-------------------------------------------------------------- |
966 |
|
* |
967 |
|
* TextDeleteChars -- |
968 |
|
* |
969 |
|
* Delete one or more characters from a text item. |
970 |
|
* |
971 |
|
* Results: |
972 |
|
* None. |
973 |
|
* |
974 |
|
* Side effects: |
975 |
|
* Characters between "first" and "last", inclusive, get |
976 |
|
* deleted from itemPtr, and things like the selection |
977 |
|
* position get updated. |
978 |
|
* |
979 |
|
*-------------------------------------------------------------- |
980 |
|
*/ |
981 |
|
|
982 |
|
static void |
983 |
|
TextDeleteChars(canvas, itemPtr, first, last) |
984 |
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
985 |
|
Tk_Item *itemPtr; /* Item in which to delete characters. */ |
986 |
|
int first; /* Character index of first character to |
987 |
|
* delete. */ |
988 |
|
int last; /* Character index of last character to |
989 |
|
* delete (inclusive). */ |
990 |
|
{ |
991 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
992 |
|
int byteIndex, byteCount, charsRemoved; |
993 |
|
char *new, *text; |
994 |
|
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; |
995 |
|
|
996 |
|
text = textPtr->text; |
997 |
|
if (first < 0) { |
998 |
|
first = 0; |
999 |
|
} |
1000 |
|
if (last >= textPtr->numChars) { |
1001 |
|
last = textPtr->numChars - 1; |
1002 |
|
} |
1003 |
|
if (first > last) { |
1004 |
|
return; |
1005 |
|
} |
1006 |
|
charsRemoved = last + 1 - first; |
1007 |
|
|
1008 |
|
byteIndex = Tcl_UtfAtIndex(text, first) - text; |
1009 |
|
byteCount = Tcl_UtfAtIndex(text + byteIndex, charsRemoved) |
1010 |
|
- (text + byteIndex); |
1011 |
|
|
1012 |
|
new = (char *) ckalloc((unsigned) (textPtr->numBytes + 1 - byteCount)); |
1013 |
|
memcpy(new, text, (size_t) byteIndex); |
1014 |
|
strcpy(new + byteIndex, text + byteIndex + byteCount); |
1015 |
|
|
1016 |
|
ckfree(text); |
1017 |
|
textPtr->text = new; |
1018 |
|
textPtr->numChars -= charsRemoved; |
1019 |
|
textPtr->numBytes -= byteCount; |
1020 |
|
|
1021 |
|
/* |
1022 |
|
* Update indexes for the selection and cursor to reflect the |
1023 |
|
* renumbering of the remaining characters. |
1024 |
|
*/ |
1025 |
|
|
1026 |
|
if (textInfoPtr->selItemPtr == itemPtr) { |
1027 |
|
if (textInfoPtr->selectFirst > first) { |
1028 |
|
textInfoPtr->selectFirst -= charsRemoved; |
1029 |
|
if (textInfoPtr->selectFirst < first) { |
1030 |
|
textInfoPtr->selectFirst = first; |
1031 |
|
} |
1032 |
|
} |
1033 |
|
if (textInfoPtr->selectLast >= first) { |
1034 |
|
textInfoPtr->selectLast -= charsRemoved; |
1035 |
|
if (textInfoPtr->selectLast < first - 1) { |
1036 |
|
textInfoPtr->selectLast = first - 1; |
1037 |
|
} |
1038 |
|
} |
1039 |
|
if (textInfoPtr->selectFirst > textInfoPtr->selectLast) { |
1040 |
|
textInfoPtr->selItemPtr = NULL; |
1041 |
|
} |
1042 |
|
if ((textInfoPtr->anchorItemPtr == itemPtr) |
1043 |
|
&& (textInfoPtr->selectAnchor > first)) { |
1044 |
|
textInfoPtr->selectAnchor -= charsRemoved; |
1045 |
|
if (textInfoPtr->selectAnchor < first) { |
1046 |
|
textInfoPtr->selectAnchor = first; |
1047 |
|
} |
1048 |
|
} |
1049 |
|
} |
1050 |
|
if (textPtr->insertPos > first) { |
1051 |
|
textPtr->insertPos -= charsRemoved; |
1052 |
|
if (textPtr->insertPos < first) { |
1053 |
|
textPtr->insertPos = first; |
1054 |
|
} |
1055 |
|
} |
1056 |
|
ComputeTextBbox(canvas, textPtr); |
1057 |
|
return; |
1058 |
|
} |
1059 |
|
|
1060 |
|
/* |
1061 |
|
*-------------------------------------------------------------- |
1062 |
|
* |
1063 |
|
* TextToPoint -- |
1064 |
|
* |
1065 |
|
* Computes the distance from a given point to a given |
1066 |
|
* text item, in canvas units. |
1067 |
|
* |
1068 |
|
* Results: |
1069 |
|
* The return value is 0 if the point whose x and y coordinates |
1070 |
|
* are pointPtr[0] and pointPtr[1] is inside the text item. If |
1071 |
|
* the point isn't inside the text item then the return value |
1072 |
|
* is the distance from the point to the text item. |
1073 |
|
* |
1074 |
|
* Side effects: |
1075 |
|
* None. |
1076 |
|
* |
1077 |
|
*-------------------------------------------------------------- |
1078 |
|
*/ |
1079 |
|
|
1080 |
|
static double |
1081 |
|
TextToPoint(canvas, itemPtr, pointPtr) |
1082 |
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
1083 |
|
Tk_Item *itemPtr; /* Item to check against point. */ |
1084 |
|
double *pointPtr; /* Pointer to x and y coordinates. */ |
1085 |
|
{ |
1086 |
|
TextItem *textPtr; |
1087 |
|
Tk_State state = itemPtr->state; |
1088 |
|
double value; |
1089 |
|
|
1090 |
|
if (state == TK_STATE_NULL) { |
1091 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
1092 |
|
} |
1093 |
|
textPtr = (TextItem *) itemPtr; |
1094 |
|
value = (double) Tk_DistanceToTextLayout(textPtr->textLayout, |
1095 |
|
(int) pointPtr[0] - textPtr->leftEdge, |
1096 |
|
(int) pointPtr[1] - textPtr->header.y1); |
1097 |
|
|
1098 |
|
if ((state == TK_STATE_HIDDEN) || (textPtr->color == NULL) || |
1099 |
|
(textPtr->text == NULL) || (*textPtr->text == 0)) { |
1100 |
|
value = 1.0e36; |
1101 |
|
} |
1102 |
|
return value; |
1103 |
|
} |
1104 |
|
|
1105 |
|
/* |
1106 |
|
*-------------------------------------------------------------- |
1107 |
|
* |
1108 |
|
* TextToArea -- |
1109 |
|
* |
1110 |
|
* This procedure is called to determine whether an item |
1111 |
|
* lies entirely inside, entirely outside, or overlapping |
1112 |
|
* a given rectangle. |
1113 |
|
* |
1114 |
|
* Results: |
1115 |
|
* -1 is returned if the item is entirely outside the area |
1116 |
|
* given by rectPtr, 0 if it overlaps, and 1 if it is entirely |
1117 |
|
* inside the given area. |
1118 |
|
* |
1119 |
|
* Side effects: |
1120 |
|
* None. |
1121 |
|
* |
1122 |
|
*-------------------------------------------------------------- |
1123 |
|
*/ |
1124 |
|
|
1125 |
|
static int |
1126 |
|
TextToArea(canvas, itemPtr, rectPtr) |
1127 |
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
1128 |
|
Tk_Item *itemPtr; /* Item to check against rectangle. */ |
1129 |
|
double *rectPtr; /* Pointer to array of four coordinates |
1130 |
|
* (x1, y1, x2, y2) describing rectangular |
1131 |
|
* area. */ |
1132 |
|
{ |
1133 |
|
TextItem *textPtr; |
1134 |
|
Tk_State state = itemPtr->state; |
1135 |
|
|
1136 |
|
if (state == TK_STATE_NULL) { |
1137 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
1138 |
|
} |
1139 |
|
|
1140 |
|
textPtr = (TextItem *) itemPtr; |
1141 |
|
return Tk_IntersectTextLayout(textPtr->textLayout, |
1142 |
|
(int) (rectPtr[0] + 0.5) - textPtr->leftEdge, |
1143 |
|
(int) (rectPtr[1] + 0.5) - textPtr->header.y1, |
1144 |
|
(int) (rectPtr[2] - rectPtr[0] + 0.5), |
1145 |
|
(int) (rectPtr[3] - rectPtr[1] + 0.5)); |
1146 |
|
} |
1147 |
|
|
1148 |
|
/* |
1149 |
|
*-------------------------------------------------------------- |
1150 |
|
* |
1151 |
|
* ScaleText -- |
1152 |
|
* |
1153 |
|
* This procedure is invoked to rescale a text item. |
1154 |
|
* |
1155 |
|
* Results: |
1156 |
|
* None. |
1157 |
|
* |
1158 |
|
* Side effects: |
1159 |
|
* Scales the position of the text, but not the size |
1160 |
|
* of the font for the text. |
1161 |
|
* |
1162 |
|
*-------------------------------------------------------------- |
1163 |
|
*/ |
1164 |
|
|
1165 |
|
/* ARGSUSED */ |
1166 |
|
static void |
1167 |
|
ScaleText(canvas, itemPtr, originX, originY, scaleX, scaleY) |
1168 |
|
Tk_Canvas canvas; /* Canvas containing rectangle. */ |
1169 |
|
Tk_Item *itemPtr; /* Rectangle to be scaled. */ |
1170 |
|
double originX, originY; /* Origin about which to scale rect. */ |
1171 |
|
double scaleX; /* Amount to scale in X direction. */ |
1172 |
|
double scaleY; /* Amount to scale in Y direction. */ |
1173 |
|
{ |
1174 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
1175 |
|
|
1176 |
|
textPtr->x = originX + scaleX*(textPtr->x - originX); |
1177 |
|
textPtr->y = originY + scaleY*(textPtr->y - originY); |
1178 |
|
ComputeTextBbox(canvas, textPtr); |
1179 |
|
return; |
1180 |
|
} |
1181 |
|
|
1182 |
|
/* |
1183 |
|
*-------------------------------------------------------------- |
1184 |
|
* |
1185 |
|
* TranslateText -- |
1186 |
|
* |
1187 |
|
* This procedure is called to move a text item by a |
1188 |
|
* given amount. |
1189 |
|
* |
1190 |
|
* Results: |
1191 |
|
* None. |
1192 |
|
* |
1193 |
|
* Side effects: |
1194 |
|
* The position of the text item is offset by (xDelta, yDelta), |
1195 |
|
* and the bounding box is updated in the generic part of the |
1196 |
|
* item structure. |
1197 |
|
* |
1198 |
|
*-------------------------------------------------------------- |
1199 |
|
*/ |
1200 |
|
|
1201 |
|
static void |
1202 |
|
TranslateText(canvas, itemPtr, deltaX, deltaY) |
1203 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
1204 |
|
Tk_Item *itemPtr; /* Item that is being moved. */ |
1205 |
|
double deltaX, deltaY; /* Amount by which item is to be moved. */ |
1206 |
|
{ |
1207 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
1208 |
|
|
1209 |
|
textPtr->x += deltaX; |
1210 |
|
textPtr->y += deltaY; |
1211 |
|
ComputeTextBbox(canvas, textPtr); |
1212 |
|
} |
1213 |
|
|
1214 |
|
/* |
1215 |
|
*-------------------------------------------------------------- |
1216 |
|
* |
1217 |
|
* GetTextIndex -- |
1218 |
|
* |
1219 |
|
* Parse an index into a text item and return either its value |
1220 |
|
* or an error. |
1221 |
|
* |
1222 |
|
* Results: |
1223 |
|
* A standard Tcl result. If all went well, then *indexPtr is |
1224 |
|
* filled in with the index (into itemPtr) corresponding to |
1225 |
|
* string. Otherwise an error message is left in |
1226 |
|
* the interp's result. |
1227 |
|
* |
1228 |
|
* Side effects: |
1229 |
|
* None. |
1230 |
|
* |
1231 |
|
*-------------------------------------------------------------- |
1232 |
|
*/ |
1233 |
|
|
1234 |
|
static int |
1235 |
|
GetTextIndex(interp, canvas, itemPtr, obj, indexPtr) |
1236 |
|
Tcl_Interp *interp; /* Used for error reporting. */ |
1237 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
1238 |
|
Tk_Item *itemPtr; /* Item for which the index is being |
1239 |
|
* specified. */ |
1240 |
|
Tcl_Obj *obj; /* Specification of a particular character |
1241 |
|
* in itemPtr's text. */ |
1242 |
|
int *indexPtr; /* Where to store converted character |
1243 |
|
* index. */ |
1244 |
|
{ |
1245 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
1246 |
|
size_t length; |
1247 |
|
int c; |
1248 |
|
TkCanvas *canvasPtr = (TkCanvas *) canvas; |
1249 |
|
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; |
1250 |
|
char *string = Tcl_GetStringFromObj(obj, (int *) &length); |
1251 |
|
|
1252 |
|
c = string[0]; |
1253 |
|
length = strlen(string); |
1254 |
|
|
1255 |
|
if ((c == 'e') && (strncmp(string, "end", length) == 0)) { |
1256 |
|
*indexPtr = textPtr->numChars; |
1257 |
|
} else if ((c == 'i') && (strncmp(string, "insert", length) == 0)) { |
1258 |
|
*indexPtr = textPtr->insertPos; |
1259 |
|
} else if ((c == 's') && (strncmp(string, "sel.first", length) == 0) |
1260 |
|
&& (length >= 5)) { |
1261 |
|
if (textInfoPtr->selItemPtr != itemPtr) { |
1262 |
|
Tcl_SetResult(interp, "selection isn't in item", TCL_STATIC); |
1263 |
|
return TCL_ERROR; |
1264 |
|
} |
1265 |
|
*indexPtr = textInfoPtr->selectFirst; |
1266 |
|
} else if ((c == 's') && (strncmp(string, "sel.last", length) == 0) |
1267 |
|
&& (length >= 5)) { |
1268 |
|
if (textInfoPtr->selItemPtr != itemPtr) { |
1269 |
|
Tcl_SetResult(interp, "selection isn't in item", TCL_STATIC); |
1270 |
|
return TCL_ERROR; |
1271 |
|
} |
1272 |
|
*indexPtr = textInfoPtr->selectLast; |
1273 |
|
} else if (c == '@') { |
1274 |
|
int x, y; |
1275 |
|
double tmp; |
1276 |
|
char *end, *p; |
1277 |
|
|
1278 |
|
p = string+1; |
1279 |
|
tmp = strtod(p, &end); |
1280 |
|
if ((end == p) || (*end != ',')) { |
1281 |
|
goto badIndex; |
1282 |
|
} |
1283 |
|
x = (int) ((tmp < 0) ? tmp - 0.5 : tmp + 0.5); |
1284 |
|
p = end+1; |
1285 |
|
tmp = strtod(p, &end); |
1286 |
|
if ((end == p) || (*end != 0)) { |
1287 |
|
goto badIndex; |
1288 |
|
} |
1289 |
|
y = (int) ((tmp < 0) ? tmp - 0.5 : tmp + 0.5); |
1290 |
|
*indexPtr = Tk_PointToChar(textPtr->textLayout, |
1291 |
|
x + canvasPtr->scrollX1 - textPtr->leftEdge, |
1292 |
|
y + canvasPtr->scrollY1 - textPtr->header.y1); |
1293 |
|
} else if (Tcl_GetIntFromObj((Tcl_Interp *)NULL, obj, indexPtr) == TCL_OK) { |
1294 |
|
if (*indexPtr < 0){ |
1295 |
|
*indexPtr = 0; |
1296 |
|
} else if (*indexPtr > textPtr->numChars) { |
1297 |
|
*indexPtr = textPtr->numChars; |
1298 |
|
} |
1299 |
|
} else { |
1300 |
|
/* |
1301 |
|
* Some of the paths here leave messages in the interp's result, |
1302 |
|
* so we have to clear it out before storing our own message. |
1303 |
|
*/ |
1304 |
|
|
1305 |
|
badIndex: |
1306 |
|
Tcl_SetResult(interp, (char *) NULL, TCL_STATIC); |
1307 |
|
Tcl_AppendResult(interp, "bad index \"", string, "\"", |
1308 |
|
(char *) NULL); |
1309 |
|
return TCL_ERROR; |
1310 |
|
} |
1311 |
|
return TCL_OK; |
1312 |
|
} |
1313 |
|
|
1314 |
|
/* |
1315 |
|
*-------------------------------------------------------------- |
1316 |
|
* |
1317 |
|
* SetTextCursor -- |
1318 |
|
* |
1319 |
|
* Set the position of the insertion cursor in this item. |
1320 |
|
* |
1321 |
|
* Results: |
1322 |
|
* None. |
1323 |
|
* |
1324 |
|
* Side effects: |
1325 |
|
* The cursor position will change. |
1326 |
|
* |
1327 |
|
*-------------------------------------------------------------- |
1328 |
|
*/ |
1329 |
|
|
1330 |
|
/* ARGSUSED */ |
1331 |
|
static void |
1332 |
|
SetTextCursor(canvas, itemPtr, index) |
1333 |
|
Tk_Canvas canvas; /* Record describing canvas widget. */ |
1334 |
|
Tk_Item *itemPtr; /* Text item in which cursor position is to |
1335 |
|
* be set. */ |
1336 |
|
int index; /* Character index of character just before |
1337 |
|
* which cursor is to be positioned. */ |
1338 |
|
{ |
1339 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
1340 |
|
|
1341 |
|
if (index < 0) { |
1342 |
|
textPtr->insertPos = 0; |
1343 |
|
} else if (index > textPtr->numChars) { |
1344 |
|
textPtr->insertPos = textPtr->numChars; |
1345 |
|
} else { |
1346 |
|
textPtr->insertPos = index; |
1347 |
|
} |
1348 |
|
} |
1349 |
|
|
1350 |
|
/* |
1351 |
|
*-------------------------------------------------------------- |
1352 |
|
* |
1353 |
|
* GetSelText -- |
1354 |
|
* |
1355 |
|
* This procedure is invoked to return the selected portion |
1356 |
|
* of a text item. It is only called when this item has |
1357 |
|
* the selection. |
1358 |
|
* |
1359 |
|
* Results: |
1360 |
|
* The return value is the number of non-NULL bytes stored |
1361 |
|
* at buffer. Buffer is filled (or partially filled) with a |
1362 |
|
* NULL-terminated string containing part or all of the selection, |
1363 |
|
* as given by offset and maxBytes. |
1364 |
|
* |
1365 |
|
* Side effects: |
1366 |
|
* None. |
1367 |
|
* |
1368 |
|
*-------------------------------------------------------------- |
1369 |
|
*/ |
1370 |
|
|
1371 |
|
static int |
1372 |
|
GetSelText(canvas, itemPtr, offset, buffer, maxBytes) |
1373 |
|
Tk_Canvas canvas; /* Canvas containing selection. */ |
1374 |
|
Tk_Item *itemPtr; /* Text item containing selection. */ |
1375 |
|
int offset; /* Byte offset within selection of first |
1376 |
|
* character to be returned. */ |
1377 |
|
char *buffer; /* Location in which to place selection. */ |
1378 |
|
int maxBytes; /* Maximum number of bytes to place at |
1379 |
|
* buffer, not including terminating NULL |
1380 |
|
* character. */ |
1381 |
|
{ |
1382 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
1383 |
|
int byteCount; |
1384 |
|
char *text, *selStart, *selEnd; |
1385 |
|
Tk_CanvasTextInfo *textInfoPtr = textPtr->textInfoPtr; |
1386 |
|
|
1387 |
|
if ((textInfoPtr->selectFirst < 0) || |
1388 |
|
(textInfoPtr->selectFirst > textInfoPtr->selectLast)) { |
1389 |
|
return 0; |
1390 |
|
} |
1391 |
|
text = textPtr->text; |
1392 |
|
selStart = Tcl_UtfAtIndex(text, textInfoPtr->selectFirst); |
1393 |
|
selEnd = Tcl_UtfAtIndex(selStart, |
1394 |
|
textInfoPtr->selectLast + 1 - textInfoPtr->selectFirst); |
1395 |
|
byteCount = selEnd - selStart - offset; |
1396 |
|
if (byteCount > maxBytes) { |
1397 |
|
byteCount = maxBytes; |
1398 |
|
} |
1399 |
|
if (byteCount <= 0) { |
1400 |
|
return 0; |
1401 |
|
} |
1402 |
|
memcpy(buffer, selStart + offset, (size_t) byteCount); |
1403 |
|
buffer[byteCount] = '\0'; |
1404 |
|
return byteCount; |
1405 |
|
} |
1406 |
|
|
1407 |
|
/* |
1408 |
|
*-------------------------------------------------------------- |
1409 |
|
* |
1410 |
|
* TextToPostscript -- |
1411 |
|
* |
1412 |
|
* This procedure is called to generate Postscript for |
1413 |
|
* text items. |
1414 |
|
* |
1415 |
|
* Results: |
1416 |
|
* The return value is a standard Tcl result. If an error |
1417 |
|
* occurs in generating Postscript then an error message is |
1418 |
|
* left in the interp's result, replacing whatever used |
1419 |
|
* to be there. If no error occurs, then Postscript for the |
1420 |
|
* item is appended to the result. |
1421 |
|
* |
1422 |
|
* Side effects: |
1423 |
|
* None. |
1424 |
|
* |
1425 |
|
*-------------------------------------------------------------- |
1426 |
|
*/ |
1427 |
|
|
1428 |
|
static int |
1429 |
|
TextToPostscript(interp, canvas, itemPtr, prepass) |
1430 |
|
Tcl_Interp *interp; /* Leave Postscript or error message here. */ |
1431 |
|
Tk_Canvas canvas; /* Information about overall canvas. */ |
1432 |
|
Tk_Item *itemPtr; /* Item for which Postscript is wanted. */ |
1433 |
|
int prepass; /* 1 means this is a prepass to collect |
1434 |
|
* font information; 0 means final Postscript |
1435 |
|
* is being created. */ |
1436 |
|
{ |
1437 |
|
TextItem *textPtr = (TextItem *) itemPtr; |
1438 |
|
int x, y; |
1439 |
|
Tk_FontMetrics fm; |
1440 |
|
char *justify; |
1441 |
|
char buffer[500]; |
1442 |
|
XColor *color; |
1443 |
|
Pixmap stipple; |
1444 |
|
Tk_State state = itemPtr->state; |
1445 |
|
|
1446 |
|
if(state == TK_STATE_NULL) { |
1447 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
1448 |
|
} |
1449 |
|
color = textPtr->color; |
1450 |
|
stipple = textPtr->stipple; |
1451 |
|
if (state == TK_STATE_HIDDEN || textPtr->color == NULL || |
1452 |
|
textPtr->text == NULL || *textPtr->text == 0) { |
1453 |
|
return TCL_OK; |
1454 |
|
} else if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
1455 |
|
if (textPtr->activeColor!=NULL) { |
1456 |
|
color = textPtr->activeColor; |
1457 |
|
} |
1458 |
|
if (textPtr->activeStipple!=None) { |
1459 |
|
stipple = textPtr->activeStipple; |
1460 |
|
} |
1461 |
|
} else if (state==TK_STATE_DISABLED) { |
1462 |
|
if (textPtr->disabledColor!=NULL) { |
1463 |
|
color = textPtr->disabledColor; |
1464 |
|
} |
1465 |
|
if (textPtr->disabledStipple!=None) { |
1466 |
|
stipple = textPtr->disabledStipple; |
1467 |
|
} |
1468 |
|
} |
1469 |
|
|
1470 |
|
if (Tk_CanvasPsFont(interp, canvas, textPtr->tkfont) != TCL_OK) { |
1471 |
|
return TCL_ERROR; |
1472 |
|
} |
1473 |
|
if (prepass != 0) { |
1474 |
|
return TCL_OK; |
1475 |
|
} |
1476 |
|
if (Tk_CanvasPsColor(interp, canvas, color) != TCL_OK) { |
1477 |
|
return TCL_ERROR; |
1478 |
|
} |
1479 |
|
if (stipple != None) { |
1480 |
|
Tcl_AppendResult(interp, "/StippleText {\n ", |
1481 |
|
(char *) NULL); |
1482 |
|
Tk_CanvasPsStipple(interp, canvas, stipple); |
1483 |
|
Tcl_AppendResult(interp, "} bind def\n", (char *) NULL); |
1484 |
|
} |
1485 |
|
|
1486 |
|
sprintf(buffer, "%.15g %.15g [\n", textPtr->x, |
1487 |
|
Tk_CanvasPsY(canvas, textPtr->y)); |
1488 |
|
Tcl_AppendResult(interp, buffer, (char *) NULL); |
1489 |
|
|
1490 |
|
Tk_TextLayoutToPostscript(interp, textPtr->textLayout); |
1491 |
|
|
1492 |
|
x = 0; y = 0; justify = NULL; /* lint. */ |
1493 |
|
switch (textPtr->anchor) { |
1494 |
|
case TK_ANCHOR_NW: x = 0; y = 0; break; |
1495 |
|
case TK_ANCHOR_N: x = 1; y = 0; break; |
1496 |
|
case TK_ANCHOR_NE: x = 2; y = 0; break; |
1497 |
|
case TK_ANCHOR_E: x = 2; y = 1; break; |
1498 |
|
case TK_ANCHOR_SE: x = 2; y = 2; break; |
1499 |
|
case TK_ANCHOR_S: x = 1; y = 2; break; |
1500 |
|
case TK_ANCHOR_SW: x = 0; y = 2; break; |
1501 |
|
case TK_ANCHOR_W: x = 0; y = 1; break; |
1502 |
|
case TK_ANCHOR_CENTER: x = 1; y = 1; break; |
1503 |
|
} |
1504 |
|
switch (textPtr->justify) { |
1505 |
|
case TK_JUSTIFY_LEFT: justify = "0"; break; |
1506 |
|
case TK_JUSTIFY_CENTER: justify = "0.5";break; |
1507 |
|
case TK_JUSTIFY_RIGHT: justify = "1"; break; |
1508 |
|
} |
1509 |
|
|
1510 |
|
Tk_GetFontMetrics(textPtr->tkfont, &fm); |
1511 |
|
sprintf(buffer, "] %d %g %g %s %s DrawText\n", |
1512 |
|
fm.linespace, x / -2.0, y / 2.0, justify, |
1513 |
|
((stipple == None) ? "false" : "true")); |
1514 |
|
Tcl_AppendResult(interp, buffer, (char *) NULL); |
1515 |
|
|
1516 |
|
return TCL_OK; |
1517 |
|
} |
1518 |
|
/* $Header$ */ |
1519 |
|
|
1520 |
|
/* End of tkcanvtext.c */ |